MESON Chess Problem Database
Problem Display
PID: 64023 (3R2B1/6B1/4p1P1/1n5R/2PPkpPp/3n3K/N3Pp2/Q4N2 w - - 0 1)
Zappas, Byron
2nd Prize, Schakend Nederland, 1978
#2
13 + 7
| 3750 | FIDE Album (1977-1979) | 1984 |
| 4901 | Best Problems | 2008 |
| 702 | Phenix | 2018 |
| 133 | The Problemist Supplement | 2018 |
SOLUTION
- SOUND
- Sets
- 1...Sc1
- 2.Re5#
- 1...Se1
- 2.Re5#
- 1...Sb2
- 2.Re5#
- 1...Sb4
- 2.Re5#
- 1...Sc5
- 2.Re5#
- 1...Se5
- 2.Rxe5#
- 1...Sa3
- 2.Sc3#
- 1...Sc3
- 2.Sxc3#
- 1...Sxd4
- 2.Sc3#
- 2.Rxd4#
- 2.Qxd4#
- 1...Sd6
- 2.Sc3#
- 1...Sa7
- 2.Sc3#
- 1...Sc7
- 2.Sc3#
- 1...e5
- 2.Bd5#
- 1...Sc1
- Tries
- 1.Kxh4?
- 1...Sxd4
- 2.Sc3#
- 2.Rxd4#
- 2.Qxd4#
- 1...Sc1
- 2.Re5#
- 1...Se1
- 2.Re5#
- 1...Sb2
- 2.Re5#
- 1...Sb4
- 2.Re5#
- 1...Sc5
- 2.Re5#
- 1...Se5
- 2.Rxe5#
- 1...Sa3
- 2.Sc3#
- 1...Sc3
- 2.Sxc3#
- 1...Sd6
- 2.Sc3#
- 1...Sa7
- 2.Sc3#
- 1...Sc7
- 2.Sc3#
- 1...e5
- 2.Bd5#
- 1...f3!
- 1...Sxd4
- 1.Bf6?
- 1...Sxd4
- 2.Sc3#
- 2.Rxd4#
- 2.Qxd4#
- 1...Sa3
- 2.Sc3#
- 1...Sc1
- 2.Re5#
- 1...Se1
- 2.Re5#
- 1...Sb2
- 2.Re5#
- 1...Sb4
- 2.Re5#
- 1...Sc5
- 2.Re5#
- 1...Se5
- 2.Rxe5#
- 1...Sc3
- 2.Sxc3#
- 1...Sd6
- 2.Sc3#
- 1...Sa7
- 2.Sc3#
- 1...Sc7
- 2.Sc3#
- 1...e5
- 2.Bd5#
- 1...f3!
- 1...Sxd4
- 1.Bh6?
- 1...Sxd4
- 2.Sc3#
- 2.Rxd4#
- 2.Qxd4#
- 1...Sa3
- 2.Sc3#
- 1...Sc1
- 2.Re5#
- 1...Se1
- 2.Re5#
- 1...Sb2
- 2.Re5#
- 1...Sb4
- 2.Re5#
- 1...Sc5
- 2.Re5#
- 1...Se5
- 2.Rxe5#
- 1...Sc3
- 2.Sxc3#
- 1...Sa7
- 2.Sc3#
- 1...Sc7
- 2.Sc3#
- 1...f3
- 2.Sd2#
- 1...e5
- 2.Bd5#
- 1...Sd6!
- 1...Sxd4
- 1.Bh8?
- 1...Sxd4
- 2.Sc3#
- 2.Rxd4#
- 2.Qxd4#
- 1...Sa3
- 2.Sc3#
- 1...Sc1
- 2.Re5#
- 1...Se1
- 2.Re5#
- 1...Sb2
- 2.Re5#
- 1...Sb4
- 2.Re5#
- 1...Sc5
- 2.Re5#
- 1...Se5
- 2.Rxe5#
- 1...Sc3
- 2.Sxc3#
- 1...Sd6
- 2.Sc3#
- 1...Sa7
- 2.Sc3#
- 1...Sc7
- 2.Sc3#
- 1...e5
- 2.Bd5#
- 1...f3!
- 1...Sxd4
- 1.Bxe6?
- threat
- 2.Bd5#
- 2.Bf5#
- 1...Sxd4
- 2.Sc3#
- 2.Bd5#
- 2.Rxd4#
- 2.Qxd4#
- 1...Sb4
- 2.Bf5#
- 2.Re5#
- 1...Sc3
- 2.Sxc3#
- 2.Bf5#
- 1...Sd6
- 2.Sc3#
- 2.Bd5#
- 1...Sc7
- 2.Sc3#
- 2.Bf5#
- 1...f3!
- threat
- 1.Bf7?
- 1...Sxd4
- 2.Sc3#
- 2.Rxd4#
- 2.Qxd4#
- 1...Sa3
- 2.Sc3#
- 1...Sc1
- 2.Re5#
- 1...Se1
- 2.Re5#
- 1...Sb2
- 2.Re5#
- 1...Sb4
- 2.Re5#
- 1...Sc5
- 2.Re5#
- 1...Se5
- 2.Rxe5#
- 1...Sc3
- 2.Sxc3#
- 1...Sd6
- 2.Sc3#
- 1...Sa7
- 2.Sc3#
- 1...Sc7
- 2.Sc3#
- 1...e5
- 2.Bd5#
- 1...f3!
- 1...Sxd4
- 1.Rg5?
- 1...Sxd4
- 2.Sc3#
- 2.Rxd4#
- 2.Qxd4#
- 1...Sa3
- 2.Sc3#
- 1...Sc1
- 2.Re5#
- 1...Se1
- 2.Re5#
- 1...Sb2
- 2.Re5#
- 1...Sb4
- 2.Re5#
- 1...Sc5
- 2.Re5#
- 1...Se5
- 2.Rxe5#
- 1...Sc3
- 2.Sxc3#
- 1...Sd6
- 2.Sc3#
- 1...Sa7
- 2.Sc3#
- 1...Sc7
- 2.Sc3#
- 1...e5
- 2.Bd5#
- 1...f3!
- 1...Sxd4
- 1.Rd6?
- 1...Sxd4
- 2.Sc3#
- 2.Rxd4#
- 2.Qxd4#
- 1...Sxd6
- 2.Sc3#
- 1...Sc1
- 2.Re5#
- 2.Rxe6#
- 1...Se1
- 2.Re5#
- 2.Rxe6#
- 1...Sb2
- 2.Re5#
- 2.Rxe6#
- 1...Sb4
- 2.Re5#
- 2.Rxe6#
- 1...Sc5
- 2.Re5#
- 1...Se5
- 2.Rxe5#
- 1...Sa3
- 2.Sc3#
- 1...Sc3
- 2.Sxc3#
- 1...Sa7
- 2.Sc3#
- 1...Sc7
- 2.Sc3#
- 1...e5
- 2.Bd5#
- 1...f3!
- 1...Sxd4
- 1.Rd7?
- 1...Sxd4
- 2.Sc3#
- 2.Rxd4#
- 2.Qxd4#
- 1...Sc1
- 2.Re5#
- 1...Se1
- 2.Re5#
- 1...Sb2
- 2.Re5#
- 1...Sb4
- 2.Re5#
- 1...Sc5
- 2.Re5#
- 1...Se5
- 2.Rxe5#
- 1...Sa3
- 2.Sc3#
- 1...Sc3
- 2.Sxc3#
- 1...Sd6
- 2.Sc3#
- 1...Sa7
- 2.Sc3#
- 1...Sc7
- 2.Sc3#
- 1...e5
- 2.Bd5#
- 1...f3!
- 1...Sxd4
- 1.Re8?
- 1...Sxd4
- 2.Sc3#
- 2.Qxd4#
- 1...Sc1
- 2.Re5#
- 2.Rxe6#
- 1...Se1
- 2.Re5#
- 2.Rxe6#
- 1...Sb2
- 2.Rxe6#
- 1...Sb4
- 2.Re5#
- 2.Rxe6#
- 1...Sc5
- 2.Re5#
- 1...Se5
- 2.Rxe5#
- 1...Sa3
- 2.Sc3#
- 1...Sc3
- 2.Sxc3#
- 1...Sd6
- 2.Sc3#
- 1...Sa7
- 2.Sc3#
- 1...Sc7
- 2.Sc3#
- 1...e5
- 2.Bd5#
- 1...f3!
- 1...Sxd4
- 1.Rf8?
- 1...Sxd4
- 2.Sc3#
- 2.Qxd4#
- 1...Sc1
- 2.Re5#
- 1...Se1
- 2.Re5#
- 1...Sb4
- 2.Re5#
- 1...Sc5
- 2.Re5#
- 1...Se5
- 2.Rxe5#
- 1...Sa3
- 2.Sc3#
- 1...Sc3
- 2.Sxc3#
- 1...Sd6
- 2.Sc3#
- 1...Sa7
- 2.Sc3#
- 1...Sc7
- 2.Sc3#
- 1...f3
- 2.exf3#
- 1...e5
- 2.Bd5#
- 1...Sb2!
- 1...Sxd4
- 1.Qb2?
- 1...Sxb2
- 2.Re5#
- 1...Sxd4
- 2.Sc3#
- 2.Rxd4#
- 2.Qxd4#
- 1...Sc1
- 2.Re5#
- 1...Se1
- 2.Re5#
- 1...Sb4
- 2.Re5#
- 1...Sc5
- 2.Re5#
- 1...Se5
- 2.Rxe5#
- 1...Sa3
- 2.Sc3#
- 2.Qb7#
- 1...Sc3
- 2.Sxc3#
- 1...Sd6
- 2.Sc3#
- 1...Sa7
- 2.Sc3#
- 1...Sc7
- 2.Sc3#
- 1...e5
- 2.Bd5#
- 1...f3!
- 1...Sxb2
- 1.Qc3?
- threat
- 2.Qxd3#
- 1...Sxc3
- 2.Sxc3#
- 1...Sc1
- 2.Sd2#
- 2.Re5#
- 2.Qf3#
- 1...Se1
- 2.Sd2#
- 2.Re5#
- 1...Sb2
- 2.Sd2#
- 2.Re5#
- 2.Qf3#
- 1...Sb4
- 2.Sd2#
- 2.Re5#
- 2.Qf3#
- 1...Sc5
- 2.Sd2#
- 2.Re5#
- 2.Qf3#
- 1...Se5
- 2.Sd2#
- 2.Rxe5#
- 1...f3!
- threat
- 1.Qb1?
- threat
- 2.Re5#
- 2.Qxd3#
- 1...Sd6
- 2.Sc3#
- 2.Qxd3#
- 1...e5
- 2.Rxe5#
- 2.Qxd3#
- 1...f3!
- threat
- 1.Qc1?
- 1...Sxc1
- 2.Re5#
- 1...Sxd4
- 2.Sc3#
- 2.Rxd4#
- 1...Se1
- 2.Re5#
- 1...Sb2
- 2.Re5#
- 1...Sb4
- 2.Re5#
- 1...Sc5
- 2.Re5#
- 1...Se5
- 2.Rxe5#
- 1...Sa3
- 2.Sc3#
- 1...Sc3
- 2.Sxc3#
- 1...Sd6
- 2.Sc3#
- 1...Sa7
- 2.Sc3#
- 1...Sc7
- 2.Sc3#
- 1...f3
- 2.Qe3#
- 1...e5!
- 1...Sxc1
- 1.Qd1?
- threat
- 2.Qxd3#
- 2.exd3#
- 1...Sc1
- 2.Re5#
- 1...Se1
- 2.Re5#
- 1...Sb2
- 2.Re5#
- 1...Sb4
- 2.Re5#
- 1...Sc5
- 2.Re5#
- 1...Se5
- 2.Rxe5#
- 1...f3!
- threat
- 1.exd3+?
- 1...Kf3
- 2.Qd1#
- 1...Kxd3!
- 1...Kf3
- 1.c5?
- 1...Sxc5
- 2.Re5#
- 1...Sxd4
- 2.Sc3#
- 2.Rxd4#
- 2.Qxd4#
- 1...Sc1
- 2.Re5#
- 1...Se1
- 2.Re5#
- 1...Sb2
- 2.Re5#
- 1...Sb4
- 2.Re5#
- 1...Se5
- 2.Rxe5#
- 1...Sa3
- 2.Sc3#
- 1...Sc3
- 2.Sxc3#
- 1...Sd6
- 2.Sc3#
- 1...Sa7
- 2.Sc3#
- 1...Sc7
- 2.Sc3#
- 1...e5
- 2.Bd5#
- 1...f3!
- 1...Sxc5
- 1.Kxh4?
- Keys
- 1.Rf5!
- 1...Sxd4
- 2.Sc3#
- 2.Rxd4#
- 2.Qxd4#
- 1...exf5
- 2.Bd5#
- 1...Sa3
- 2.Sc3#
- 1...Sc1
- 2.Re5#
- 1...Se1
- 2.Re5#
- 1...Sb2
- 2.Re5#
- 1...Sb4
- 2.Re5#
- 1...Sc5
- 2.Re5#
- 1...Se5
- 2.Rxe5#
- 1...Sc3
- 2.Sxc3#
- 1...Sd6
- 2.Sc3#
- 1...Sa7
- 2.Sc3#
- 1...Sc7
- 2.Sc3#
- 1...f3
- 2.exf3#
- 1...e5
- 2.Bd5#
- 1...Sxd4
- 1.Rf5!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 0
- Sets
- S(b);N_GUARD::R1(I)
- S(b);N_GUARD::R1(I),XS(b)
- S(f);N_GUARD::S(C)
- S(f);N_GUARD::S(C),XS(f)
- P(g);OGATE::B(M)
- Tries
- Try
- K(E);P-FLIGHT,XP(e)
- Vars
- S(b);N_GUARD::R1(I)
- S(b);N_GUARD::R1(I),XS(b)
- S(f);N_GUARD::S(C)
- S(f);N_GUARD::S(C),XS(f)
- P(g);OGATE::B(M)
- Refutation
- P(d);
- Try
- B(K);
- Vars
- S(f);N_GUARD::S(C)
- S(b);N_GUARD::R1(I)
- S(b);N_GUARD::R1(I),XS(b)
- S(f);N_GUARD::S(C),XS(f)
- P(g);OGATE::B(M)
- Refutation
- P(d);
- Try
- B(K);
- Vars
- S(f);N_GUARD::S(C)
- S(b);N_GUARD::R1(I)
- S(b);N_GUARD::R1(I),XS(b)
- S(f);N_GUARD::S(C),XS(f)
- P(d);::S(B)
- P(g);OGATE::B(M)
- Refutation
- S(f);
- Try
- B(K);
- Vars
- S(f);N_GUARD::S(C)
- S(b);N_GUARD::R1(I)
- S(b);N_GUARD::R1(I),XS(b)
- S(f);N_GUARD::S(C),XS(f)
- P(g);OGATE::B(M)
- Refutation
- P(d);
- Try
- B(M);XP(g)
- Threat
- DUALS(2)
- Refutation
- P(d);
- Try
- B(M);
- Vars
- S(f);N_GUARD::S(C)
- S(b);N_GUARD::R1(I)
- S(b);N_GUARD::R1(I),XS(b)
- S(f);N_GUARD::S(C),XS(f)
- P(g);OGATE::B(M)
- Refutation
- P(d);
- Try
- R(I);
- Vars
- S(f);N_GUARD::S(C)
- S(b);N_GUARD::R1(I)
- S(b);N_GUARD::R1(I),XS(b)
- S(f);N_GUARD::S(C),XS(f)
- P(g);OGATE::B(M)
- Refutation
- P(d);
- Try
- R(L);
- Vars
- S(f);N_GUARD,XR(L)::S(C)
- S(b);N_GUARD::R1(I)
- S(b);N_GUARD::R1(I),XS(b)
- S(f);N_GUARD::S(C)
- S(f);N_GUARD::S(C),XS(f)
- P(g);OGATE::B(M)
- Refutation
- P(d);
- Try
- R(L);
- Vars
- S(b);N_GUARD::R1(I)
- S(b);N_GUARD::R1(I),XS(b)
- S(f);N_GUARD::S(C)
- S(f);N_GUARD::S(C),XS(f)
- P(g);OGATE::B(M)
- Refutation
- P(d);
- Try
- R(L);P_PINP(g)
- Vars
- S(b);N_GUARD::R(L),XP(g)
- S(b);N_GUARD::R1(I)
- S(b);N_GUARD,N_SPINP(g)::R1(I),XS(b)
- S(f);N_GUARD::S(C)
- S(f);N_GUARD::S(C),XS(f)
- P(g);OGATE::B(M)
- Refutation
- P(d);
- Try
- R(L);
- Vars
- S(b);N_GUARD::R1(I)
- S(b);N_GUARD::R1(I),XS(b)
- S(f);N_GUARD::S(C)
- S(f);N_GUARD::S(C),XS(f)
- P(d);OGATE::P(D),XP(d)
- P(g);OGATE::B(M)
- Refutation
- S(b);
- Try
- Q(A);
- Vars
- S(b);N_GUARD,XQ(A)::R1(I)
- S(b);N_GUARD::R1(I)
- S(b);N_GUARD::R1(I),XS(b)
- S(f);N_GUARD::S(C),XS(f)
- S(f);N_GUARD::S(C)
- P(g);OGATE::B(M)
- Refutation
- P(d);
- Try
- Q(A);
- Threat
- QAB1(A),XS(b)
- Vars
- S(f);XQ(A)::S(C),XS(f)
- Refutation
- P(d);
- Try
- Q(A);P_PINS(b)
- Threat
- DUALS(2)
- Refutation
- P(d);
- Try
- Q(A);
- Vars
- S(b);N_GUARD,XQ(A)::R1(I)
- S(b);N_GUARD::R1(I)
- S(b);N_GUARD::R1(I),XS(b)
- S(f);N_GUARD::S(C)
- S(f);N_GUARD::S(C),XS(f)
- P(d);N_GUARD::QAR1(A)
- Refutation
- P(g);
- Try
- Q(A);
- Threat
- DUALS(2)
- Vars
- S(b);N_GUARD::R1(I)
- S(b);N_GUARD::R1(I),XS(b)
- Refutation
- P(d);
- Try
- P(D);CHECK,XS(b)
- Vars
- K(c);S_FLIGHT::QAB(A)
- Refutation
- K(c);S_FLIGHT,XP(D)
- Try
- P(F);
- Vars
- S(b);N_GUARD,XP(F)::R1(I)
- S(b);N_GUARD::R1(I)
- S(b);N_GUARD::R1(I),XS(b)
- S(f);N_GUARD::S(C)
- S(f);N_GUARD::S(C),XS(f)
- P(g);OGATE::B(M)
- Refutation
- P(d);
- Try
- Actual
- R(I);
- Vars
- P(g);OGATE,XR(I)::B(M)
- S(f);N_GUARD::S(C)
- S(b);N_GUARD::R1(I)
- S(b);N_GUARD::R1(I),XS(b)
- S(f);N_GUARD::S(C),XS(f)
- P(d);OGATE::P(D),XP(d)
- P(g);OGATE::B(M)
Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) &
CSS/Javascript (jQuery, Bootstrap & DataTables).