MESON Chess Problem Database
Problem Display
PID: 225775 (4Q3/Bqpp3K/Nr5p/4RP2/3k1p2/np1p2b1/1P1N1P2/7B w - - 0 1)
Seckar, Milos
Praca, 1957
#2
10 + 11
| 6490 | yacpdb | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Qd5
- 2.Rxd5#
- 1...Qxa6
- 2.Rd5#
- 1...Qc8
- 2.Rd5#
- 1...Qxa7
- 2.Rd5#
- 1...Qb8
- 2.Rd5#
- 1...Sc4
- 2.Sxb3#
- 1...Qd5
- Tries
- 1.Sf3+?
- 1...Kc4
- 2.Rc5#
- 1...Qxf3!
- 1...Kc4
- 1.Sc5?
- threat
- 2.Scxb3#
- 1...Qxa7
- 2.Rd5#
- 1...Qd5
- 2.Rxd5#
- 1...Re6!
- threat
- 1.Bd5?
- threat
- 2.Sxb3#
- 2.Sf3#
- 1...Qxa6
- 2.Sxb3#
- 1...Qxa7
- 2.Sf3#
- 1...f3
- 2.Sxb3#
- 2.Sxf3#
- 1...c5
- 2.Sf3#
- 1...Qxd5!
- threat
- 1.Bxb7?
- threat
- 2.Re4#
- 2.Rd5#
- 1...d5
- 2.Rxd5#
- 1...c6!
- threat
- 1.Bxb6+?
- 1...Qxb6
- 2.Rd5#
- 1...c5
- 2.Bxc5#
- 1...cxb6!
- 1...Qxb6
- 1.Re4+?
- 1...Qxe4
- 2.Qxe4#
- 1...Kd5!
- 1...Qxe4
- 1.Ra5?
- threat
- 2.Qe5#
- 2.Qh8#
- 1...Qxa7
- 2.Rd5#
- 2.Qe4#
- 2.Qe5#
- 1...Bxf2
- 2.Qe5#
- 1...Qd5
- 2.Rxd5#
- 1...Qe4
- 2.Qxe4#
- 1...Qc6
- 2.Qe5#
- 1...Qa8
- 2.Qe5#
- 1...Qc8
- 2.Rd5#
- 2.Qe4#
- 2.Qe5#
- 1...Qb8
- 2.Rd5#
- 2.Qxd7#
- 2.Qe4#
- 2.Qe5#
- 1...Bh4
- 2.Qe5#
- 1...Sc4
- 2.Sxb3#
- 1...Sb5
- 2.Ra4#
- 2.Qh8#
- 1...f3
- 2.Qe3#
- 1...d5
- 2.Qh8#
- 1...d6
- 2.Qh8#
- 1...c5!
- threat
- 1.Rb5?
- threat
- 2.Qe5#
- 2.Qh8#
- 1...Qxa7
- 2.Rd5#
- 2.Qe4#
- 2.Qe5#
- 1...Bxf2
- 2.Qe5#
- 1...Sxb5
- 2.Qh8#
- 1...Qd5
- 2.Rxd5#
- 1...Qe4
- 2.Qxe4#
- 1...Qc6
- 2.Qe5#
- 1...Qa8
- 2.Qe5#
- 1...Qc8
- 2.Rd5#
- 2.Qe4#
- 2.Qe5#
- 1...Qb8
- 2.Rd5#
- 2.Qxd7#
- 2.Qe4#
- 2.Qe5#
- 1...Bh4
- 2.Qe5#
- 1...Sc4
- 2.Sxb3#
- 1...f3
- 2.Qe3#
- 1...d5
- 2.Qh8#
- 1...d6
- 2.Qh8#
- 1...c5!
- threat
- 1.Qxd7+?
- 1...Qd5
- 2.Re4#
- 2.Rxd5#
- 2.Qxd5#
- 1...Kxe5!
- 1...Qd5
- 1.Sf3+?
- Keys
- 1.Rc5!
- threat
- 2.Qe5#
- 1...Qd5
- 2.Rxd5#
- 1...Qe4
- 2.Qxe4#
- 1...Re6
- 2.Rd5#
- 1...Sc4
- 2.Rxc4#
- 1...f3
- 2.Qe3#
- 1...d5
- 2.Sf3#
- 1...d6
- 2.Qh8#
- threat
- 1.Rc5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 5
- REMOVED MATES = 4
- Sets
- Q(i);N_GUARD::R1(E),XQ(i)
- Q(i);N_GUARD,XS(G)::R1(E)
- Q(i);N_GUARD::R1(E)
- Q(i);N_GUARD,N_SPINR(g),XB(H)::R1(E)
- S(a);SBLOCK::S(C),XP(b)
- Tries
- Try
- S(C);CHECK
- Vars
- K(e);N_SPINR(g),P-FLIGHT::R1(E)
- Refutation
- Q(i);XS(C)
- Try
- S(G);N_PINR(g)
- Threat
- S(G),XP(b)
- Vars
- Q(i);N_GUARD,XB(H)::R1(E)
- Q(i);N_GUARD::R1(E),XQ(i)
- Refutation
- R(g);
- Try
- B(A);
- Threat
- DUALS(2)
- Vars
- Q(i);XS(G)::S(C),XP(b)
- Q(i);N_SPINR(g),XB(H)::S(C)
- P(j);N_SPINR(g)::S(C)
- Refutation
- Q(i);XB(A)
- Try
- B(A);XQ(i)
- Threat
- DUALS(2)
- Vars
- P(k);::R1(E),XP(k)
- Refutation
- P(j);
- Try
- B(H);CHECK,XR(g)
- Vars
- Q(i);XB(H)::R1(E)
- P(j);P_SPINP(j)::B(H),XP(j)
- Refutation
- P(j);XB(H)
- Try
- R(E);CHECK
- Vars
- Q(i);OGATE,P_PINP(F),XR(E)::QAR1(J),XQ(i)
- Refutation
- K(e);N_SPINR(g),P-FLIGHT
- Try
- R(E);
- Threat
- DUALS(2)
- Vars
- B(d);XP(D)::QAB1(J)
- Q(i);N_GUARD::R1(E),XQ(i)
- Q(i);N_GUARD,P_PINP(F)::QAR1(J),XQ(i)
- Q(i);::QAB1(J)
- B(d);::QAB1(J)
- S(a);SBLOCK::S(C),XP(b)
- P(f);N_GUARD::QAB1(J)
- P(k);::QAB(J)
- Refutation
- P(j);N_SPINR(g)
- Try
- R(E);
- Threat
- DUALS(2)
- Vars
- B(d);XP(D)::QAB1(J)
- S(a);XR(E)::QAB(J)
- Q(i);N_GUARD::R1(E),XQ(i)
- Q(i);N_GUARD,P_PINP(F)::QAR1(J),XQ(i)
- Q(i);::QAB1(J)
- B(d);::QAB1(J)
- S(a);SBLOCK::S(C),XP(b)
- P(f);N_GUARD::QAB1(J)
- P(k);::QAB(J)
- Refutation
- P(j);N_SPINR(g)
- Try
- Q(J);CHECK,XP(k)
- Refutation
- K(e);N_SPINR(g),S_FLIGHT,XR(E)
- Try
- Actual
- R(E);N_PINR(g)
- Threat
- QAB1(J)
- Vars
- Q(i);N_GUARD::R1(E),XQ(i)
- Q(i);N_GUARD,P_PINP(F)::QAR1(J),XQ(i)
- R(g);::B(H)+R(E),DCHECK
- S(a);N_GUARD::R1(E),XS(a)
- P(f);N_GUARD::QAB1(J)
- P(k);S_CUTQ(i)::S(C)
- P(k);S_CUTR(g)::QAB(J)
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).