MESON Chess Problem Database
Problem Display
PID: 262446 (8/1n1p2p1/1KpP3b/2p5/1Nk5/Pp1R1Q1p/6nr/BN2rb2 w - - 0 1)
Zappas, Byron
1st HM., Europe Echecs, 1967
#2
8 + 13
| 6490 | yacpdb | 2022 |
SOLUTION
- SOUND
- Sets
- 1...Rxb1
- 2.Qe4#
- 2.Qf7#
- 1...Rc1
- 2.Qe4#
- 2.Qf7#
- 1...Rd1
- 2.Qe4#
- 2.Qf7#
- 1...Re3
- 2.Sd2#
- 1...Re4
- 2.Qxe4#
- 1...Be2
- 2.Qe4#
- 2.Qf7#
- 1...Bxd3
- 2.Qxd3#
- 1...Bd2
- 2.Sxd2#
- 1...Be3
- 2.Qf7#
- 1...Se3
- 2.Qe4#
- 1...cxb4
- 2.Rd4#
- 1...g5
- 2.Sd2#
- 1...Rxb1
- Tries
- 1.Be5?
- threat
- 2.Rc3#
- 2.Qf7#
- 1...Bxd3
- 2.Qxd3#
- 2.Qf7#
- 1...Sxd6
- 2.Rc3#
- 1...cxb4
- 2.Rd4#
- 1...Rc1
- 2.Qe4#
- 2.Qf7#
- 1...Re3
- 2.Sd2#
- 2.Qf7#
- 1...Bd2
- 2.Sxd2#
- 2.Qf7#
- 1...Bf4
- 2.Rc3#
- 1...Se3
- 2.Rc3#
- 2.Qe4#
- 1...Sf4
- 2.Rc3#
- 1...Sd8
- 2.Rc3#
- 1...Rxe5!
- threat
- 1.Bxg7?
- threat
- 2.Rc3#
- 1...Bxd3
- 2.Qxd3#
- 1...Bxg7
- 2.Sd2#
- 1...cxb4
- 2.Rd4#
- 1...Rc1
- 2.Qe4#
- 2.Qf7#
- 1...Re3
- 2.Sd2#
- 1...Bd2
- 2.Sxd2#
- 1...Re5!
- threat
- 1.Rd2?
- threat
- 2.Qc3#
- 1...Bxd2
- 2.Sxd2#
- 1...cxb4
- 2.Rd4#
- 1...Rc1
- 2.Qe4#
- 2.Qf7#
- 1...Bd3
- 2.Qxd3#
- 1...Be3
- 2.Qf7#
- 1...Se3
- 2.Qe4#
- 1...Re3!
- threat
- 1.Rxb3?
- threat
- 2.Qc3#
- 1...cxb4
- 2.Rxb4#
- 1...Re3
- 2.Sd2#
- 1...Bd3
- 2.Qxd3#
- 1...Be3
- 2.Qf7#
- 1...Rc1
- 2.Qf7#
- 1...Bd2
- 2.Sxd2#
- 1...Se3!
- threat
- 1.Re3?
- threat
- 2.Sd2#
- 2.Qe4#
- 2.Qf7#
- 1...Rxb1
- 2.Re4#
- 2.Qe4#
- 2.Qf7#
- 1...Rxe3
- 2.Sd2#
- 1...Bxe3
- 2.Qf7#
- 1...Sxe3
- 2.Qe4#
- 1...Sxd6
- 2.Sd2#
- 1...b2
- 2.Qe4#
- 1...Re2
- 2.Qe4#
- 2.Qf7#
- 1...Bd3
- 2.Sd2#
- 2.Qf7#
- 1...Bf4
- 2.Sd2#
- 2.Qe4#
- 1...Sf4
- 2.Qe4#
- 1...Sh4
- 2.Qe4#
- 2.Qf7#
- 1...Sd8
- 2.Sd2#
- 2.Qe4#
- 1...Rd1!
- threat
- 1.Rd5?
- threat
- 2.Qc3#
- 1...cxb4
- 2.Rd4#
- 1...Rc1
- 2.Qe4#
- 1...Re3
- 2.Sd2#
- 1...Bd3
- 2.Qxd3#
- 1...Bd2
- 2.Sxd2#
- 1...Se3
- 2.Qe4#
- 1...Be3!
- threat
- 1.Qd1?
- threat
- 2.Rc3#
- 2.Qxb3#
- 1...Bxd3
- 2.Qxd3#
- 1...cxb4
- 2.Rd4#
- 2.Qxb3#
- 1...Re3
- 2.Sd2#
- 2.Qxb3#
- 2.Qc1#
- 1...Bd2
- 2.Sxd2#
- 2.Qxb3#
- 1...Sa5
- 2.Rc3#
- 1...b2
- 2.Rc3#
- 2.Qc2#
- 2.Qb3#
- 1...Rxd1!
- threat
- 1.Qg4+?
- 1...Re4
- 2.Qxe4#
- 1...Bf4
- 2.Sd2#
- 1...Sf4!
- 1...Re4
- 1.Qxc6?
- threat
- 2.Rd4#
- 2.Qb5#
- 2.Qd5#
- 1...Bxd3
- 2.Qb5#
- 2.Qd5#
- 1...Sxd6
- 2.Rd4#
- 2.Qd5#
- 2.Qxc5#
- 1...Re5
- 2.Rd4#
- 2.Qb5#
- 1...Rd1
- 2.Qe4#
- 2.Qb5#
- 2.Qd5#
- 1...Re4
- 2.Qxe4#
- 2.Qb5#
- 2.Qd5#
- 1...Be3
- 2.Qb5#
- 2.Qd5#
- 1...Se3
- 2.Rd4#
- 2.Qe4#
- 2.Qb5#
- 1...Sf4
- 2.Rd4#
- 2.Qb5#
- 1...b2
- 2.Qb5#
- 2.Qd5#
- 1...dxc6!
- threat
- 1.Qf2?
- threat
- 2.Rc3#
- 1...cxb4
- 2.Rd4#
- 2.Qd4#
- 1...Rc1
- 2.Qf7#
- 1...Re3
- 2.Sd2#
- 1...Bd2
- 2.Sxd2#
- 1...Be3
- 2.Qf7#
- 1...Se3
- 2.Sd2#
- 1...Bxd3!
- threat
- 1.Be5?
- Keys
- 1.Rd1!
- threat
- 2.Qc3#
- 1...cxb4
- 2.Rd4#
- 1...Re3
- 2.Sd2#
- 1...Bd3
- 2.Qxd3#
- 1...Bd2
- 2.Sxd2#
- 1...Be3
- 2.Qf7#
- 1...Se3
- 2.Qe4#
- threat
- 1.Rd1!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 2
- Sets
- R(a);S_CUTB(j)::S(B)
- R(a);N_GUARD::QAR2(E),XR(a)
- B(b);OGATE,XR(D)::QAB1(E),XB(b)
- B(j);N_GUARD::S(B),XB(j)
- B(j);S_CUTR(a)::QAB(E)
- S(c);S_CUTR(a)::QAR2(E)
- P(h);N_GUARD,XS(F)::R1(D)
- P(m);S_CUTB(j)::S(B)
- Tries
- Try
- B(A);
- Threat
- DUALS(2)
- Vars
- S(k);XP(H)::R1(D)
- P(h);N_GUARD,XS(F)::R1(D)
- B(j);::R1(D)
- S(c);::R1(D)
- S(k);::R1(D)
- Refutation
- R(a);XB(A)
- Try
- B(A);XP(m)
- Threat
- R1(D)
- Vars
- B(b);OGATE,XR(D)::QAB1(E),XB(b)
- B(j);N_GUARD,XB(A)::S(B)
- P(h);N_GUARD,XS(F)::R1(D)
- R(a);S_CUTB(j)::S(B)
- B(j);N_GUARD::S(B),XB(j)
- Refutation
- R(a);
- Try
- R(D);
- Threat
- QAR1(E)
- Vars
- B(j);XR(D)::S(B),XB(j)
- P(h);N_GUARD,XS(F)::R1(D)
- B(b);N_GUARD::QAB1(E),XB(b)
- B(j);S_CUTR(a)::QAB(E)
- S(c);S_CUTR(a)::QAR2(E)
- Refutation
- R(a);
- Try
- R(D);XP(e)
- Threat
- QAR1(E)
- Vars
- P(h);OGATE,XS(F)::R1(D),XP(h)
- R(a);S_CUTB(j)::S(B)
- B(b);N_GUARD::QAB1(E),XB(b)
- B(j);S_CUTR(a)::QAB(E)
- R(a);N_GUARD::QAB(E)
- B(j);N_GUARD::S(B),XB(j)
- Refutation
- S(c);
- Try
- R(D);
- Threat
- DUALS(3)
- Vars
- R(a);XR(D)::S(B)
- B(j);XR(D)::QAB(E)
- S(c);XR(D)::QAR2(E)
- S(k);XP(H)::S(B)
- P(e);::QAR2(E)
- S(c);::QAR2(E)
- Refutation
- R(a);
- Try
- R(D);
- Threat
- QAR1(E)
- Vars
- P(h);N_GUARD,XS(F)::R1(D)
- R(a);N_GUARD::QAR2(E)
- R(a);S_CUTB(j)::S(B)
- B(b);N_GUARD::QAB1(E),XB(b)
- B(j);N_GUARD::S(B),XB(j)
- S(c);S_CUTR(a)::QAR2(E)
- Refutation
- B(j);
- Try
- Q(E);
- Threat
- DUALS(2)
- Vars
- B(b);OGATE,XR(D)::QAB1(E),XB(b)
- S(k);::R1(D)
- Refutation
- R(a);XQ(E)
- Try
- Q(E);CHECK
- Vars
- R(a);N_GUARD,P_SPINR(a)::QAR2(E),XR(a)
- B(j);P_SPINB(j)::S(B)
- Refutation
- S(c);P_SPINS(c)
- Try
- Q(E);P_PINP(h),XP(i)
- Threat
- DUALS(3)
- Refutation
- P(l);N_SPINP(h),XQ(E)
- Try
- Q(E);
- Threat
- R1(D)
- Vars
- R(a);N_GUARD::QAB(E)
- R(a);S_CUTB(j)::S(B)
- B(j);N_GUARD::S(B),XB(j)
- B(j);S_CUTR(a)::QAB(E)
- S(c);S_CUTB(j)::S(B)
- Refutation
- B(b);XR(D)
- Try
- Actual
- R(D);
- Threat
- QAR1(E)
- Vars
- P(h);N_GUARD,XS(F)::R1(D)
- R(a);S_CUTB(j)::S(B)
- B(b);N_GUARD::QAB1(E),XB(b)
- B(j);N_GUARD::S(B),XB(j)
- B(j);S_CUTR(a)::QAB(E)
- S(c);S_CUTR(a)::QAR2(E)
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).