MESON Chess Problem Database
Problem Display
PID: 203421 (5b1R/1NrpkP2/PNp1r1P1/Q1P1R1P1/8/8/8/3K4 w - - 0 1)
Anonymous
L'Italia Scacchistica, 1924
#2
11 + 6
| 6490 | yacpdb | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Rxb7
- 2.Sc8#
- 1...Rc8
- 2.Sxc8#
- 1...Bh6
- 2.Re8#
- 1...Bg7
- 2.Re8#
- 1...d5
- 2.cxd5 ep#
- 1...d6
- 2.cxd6#
- 1...Rxb7
- Tries
- 1.Kc1?
- 1...Rxb7
- 2.Sc8#
- 1...Rc8
- 2.Sxc8#
- 1...Bh6
- 2.Re8#
- 1...Bg7
- 2.Re8#
- 1...d5
- 2.cxd5 ep#
- 1...d6
- 2.cxd6#
- 1...Rxe5!
- 1...Rxb7
- 1.Ke1?
- 1...Rxb7
- 2.Sc8#
- 1...Rc8
- 2.Sxc8#
- 1...Bh6
- 2.Re8#
- 1...Bg7
- 2.Re8#
- 1...d5
- 2.cxd5 ep#
- 1...d6
- 2.cxd6#
- 1...Rxe5+!
- 1...Rxb7
- 1.Kc2?
- 1...Rxb7
- 2.Sc8#
- 1...Rc8
- 2.Sxc8#
- 1...Bh6
- 2.Re8#
- 1...Bg7
- 2.Re8#
- 1...d5
- 2.cxd5 ep#
- 1...d6
- 2.cxd6#
- 1...Rxe5!
- 1...Rxb7
- 1.Kd2?
- 1...Rxb7
- 2.Sc8#
- 1...Rc8
- 2.Sxc8#
- 1...Bh6
- 2.Re8#
- 1...Bg7
- 2.Re8#
- 1...d5
- 2.cxd5 ep#
- 1...d6
- 2.cxd6#
- 1...Rxe5!
- 1...Rxb7
- 1.Ke2?
- 1...Rxb7
- 2.Sc8#
- 1...Rc8
- 2.Sxc8#
- 1...Bh6
- 2.Re8#
- 1...Bg7
- 2.Re8#
- 1...d5
- 2.cxd5 ep#
- 1...d6
- 2.cxd6#
- 1...Rxe5+!
- 1...Rxb7
- 1.Re2?
- 1...Rxb7
- 2.Sc8#
- 1...Re3
- 2.Rxe3#
- 1...Re4
- 2.Rxe4#
- 1...Re5
- 2.Rxe5#
- 1...Rc8
- 2.Sxc8#
- 1...Bh6
- 2.Re8#
- 1...Bg7
- 2.Re8#
- 1...d5
- 2.cxd5 ep#
- 1...d6
- 2.cxd6#
- 1...Rxe2!
- 1...Rxb7
- 1.Re3?
- 1...Rxb7
- 2.Sc8#
- 1...Re4
- 2.Rxe4#
- 1...Re5
- 2.Rxe5#
- 1...Rc8
- 2.Sxc8#
- 1...Bh6
- 2.Re8#
- 1...Bg7
- 2.Re8#
- 1...d5
- 2.cxd5 ep#
- 1...d6
- 2.cxd6#
- 1...Rxe3!
- 1...Rxb7
- 1.Re4?
- 1...Rxb7
- 2.Sc8#
- 1...Re5
- 2.Rxe5#
- 1...Rc8
- 2.Sxc8#
- 1...Bh6
- 2.Re8#
- 1...Bg7
- 2.Re8#
- 1...d5
- 2.cxd5 ep#
- 1...d6
- 2.cxd6#
- 1...Rxe4!
- 1...Rxb7
- 1.Rg8?
- 1...Rxb7
- 2.Sc8#
- 1...Rc8
- 2.Sxc8#
- 1...Bh6
- 2.Re8#
- 1...Bg7
- 2.Re8#
- 1...d5
- 2.cxd5 ep#
- 1...d6
- 2.cxd6#
- 1...Rxe5!
- 1...Rxb7
- 1.Qe1?
- 1...Rxe5
- 2.Qxe5#
- 1...Rc8
- 2.Sxc8#
- 1...Bh6
- 2.Re8#
- 1...Bg7
- 2.Re8#
- 1...d5
- 2.Rxe6#
- 2.cxd5 ep#
- 1...d6
- 2.Rxe6#
- 2.cxd6#
- 1...Rxb7!
- 1...Rxe5
- 1.Qd2?
- threat
- 2.Qd6#
- 1...d5
- 2.cxd5 ep#
- 1...d6
- 2.Qxd6#
- 2.cxd6#
- 1...Rxb7!
- threat
- 1.Qc3?
- 1...Rxe5
- 2.Qxe5#
- 1...Rc8
- 2.Sxc8#
- 1...Bh6
- 2.Re8#
- 1...Bg7
- 2.Re8#
- 1...d5
- 2.cxd5 ep#
- 1...d6
- 2.cxd6#
- 1...Rxb7!
- 1...Rxe5
- 1.Qa1?
- 1...Rxe5
- 2.Qxe5#
- 1...Rc8
- 2.Sxc8#
- 1...Bh6
- 2.Re8#
- 1...Bg7
- 2.Re8#
- 1...d5
- 2.cxd5 ep#
- 1...d6
- 2.cxd6#
- 1...Rxb7!
- 1...Rxe5
- 1.a7?
- 1...Rxb7
- 2.Sc8#
- 1...Rc8
- 2.Sxc8#
- 1...Bh6
- 2.Re8#
- 1...Bg7
- 2.Re8#
- 1...d5
- 2.cxd5 ep#
- 1...d6
- 2.cxd6#
- 1...Rxe5!
- 1...Rxb7
- 1.Kc1?
- Keys
- 1.Re1!
- 1...Rxe1+
- 2.Qxe1#
- 1...Rxb7
- 2.Sc8#
- 1...Re2
- 2.Rxe2#
- 1...Re3
- 2.Rxe3#
- 1...Re4
- 2.Rxe4#
- 1...Re5
- 2.Rxe5#
- 1...Rc8
- 2.Sxc8#
- 1...Bh6
- 2.Re8#
- 1...Bg7
- 2.Re8#
- 1...d5
- 2.cxd5 ep#
- 1...d6
- 2.cxd6#
- 1...Rxe1+
- 1.Re1!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 5
- REMOVED MATES = 0
- Sets
- R(c);N_GUARD,XS(I)::S(G)
- R(c);N_GUARD::S(G),XR(c)
- B(f);OGATE::R1(K)
- P(d);OGATE::P(C),XP(d),EP
- P(d);OGATE::P(C),XP(d)
- Tries
- Try
- K(A);P-FLIGHT
- Vars
- R(c);N_GUARD,XS(I)::S(G)
- R(c);N_GUARD::S(G),XR(c)
- B(f);OGATE,P_PINP(E)::R1(K)
- B(f);OGATE::R1(K)
- P(d);OGATE::P(C),XP(d),EP
- P(d);OGATE::P(C),XP(d)
- Refutation
- R(b);N_SPINR(b),XR(D)
- Try
- K(A);P-FLIGHT,P_SPINR(D)
- Vars
- R(c);N_GUARD,XS(I)::S(G)
- R(c);N_GUARD::S(G),XR(c)
- B(f);OGATE::R1(K)
- P(d);OGATE::P(C),XP(d),EP
- P(d);OGATE::P(C),XP(d)
- Refutation
- R(b);CHECK,N_SPINR(b),XR(D)
- Try
- K(A);S_FLIGHT
- Vars
- R(c);N_GUARD,XS(I)::S(G)
- R(c);N_GUARD::S(G),XR(c)
- B(f);OGATE::R1(K)
- P(d);OGATE::P(C),XP(d),EP
- P(d);OGATE::P(C),XP(d)
- Refutation
- R(b);N_SPINR(b),XR(D)
- Try
- K(A);P-FLIGHT
- Vars
- R(c);N_GUARD,XS(I)::S(G)
- R(c);N_GUARD::S(G),XR(c)
- B(f);OGATE,P_PINP(E)::R1(K)
- B(f);OGATE::R1(K)
- P(d);OGATE::P(C),XP(d),EP
- P(d);OGATE::P(C),XP(d)
- Refutation
- R(b);N_SPINR(b),XR(D)
- Try
- K(A);P_SPINR(D),S_FLIGHT
- Vars
- R(c);N_GUARD,XS(I)::S(G)
- R(c);N_GUARD::S(G),XR(c)
- B(f);OGATE::R1(K)
- P(d);OGATE::P(C),XP(d),EP
- P(d);OGATE::P(C),XP(d)
- Refutation
- R(b);CHECK,N_SPINR(b),XR(D)
- Try
- R(D);
- Vars
- R(c);N_GUARD,XS(I)::S(G)
- R(b);OGATEB::R(D),XR(b)
- R(c);N_GUARD::S(G),XR(c)
- B(f);OGATE::R1(K)
- P(d);OGATE::P(C),XP(d),EP
- P(d);OGATE::P(C),XP(d)
- Refutation
- R(b);N_SPINR(b),XR(D)
- Try
- R(D);
- Vars
- R(c);N_GUARD,XS(I)::S(G)
- R(b);OGATEB::R(D),XR(b)
- R(c);N_GUARD::S(G),XR(c)
- B(f);OGATE::R1(K)
- P(d);OGATE::P(C),XP(d),EP
- P(d);OGATE::P(C),XP(d)
- Refutation
- R(b);N_SPINR(b),XR(D)
- Try
- R(D);
- Vars
- R(c);N_GUARD,XS(I)::S(G)
- R(b);OGATEB::R(D),XR(b)
- R(c);N_GUARD::S(G),XR(c)
- B(f);OGATE::R1(K)
- P(d);OGATE::P(C),XP(d),EP
- P(d);OGATE::P(C),XP(d)
- Refutation
- R(b);N_SPINR(b),XR(D)
- Try
- R(K);
- Vars
- R(c);N_GUARD,XS(I)::S(G)
- R(c);N_GUARD::S(G),XR(c)
- B(f);OGATE::R1(K)
- P(d);OGATE::P(C),XP(d),EP
- P(d);OGATE::P(C),XP(d)
- Refutation
- R(b);N_SPINR(b),XR(D)
- Try
- Q(B);
- Vars
- R(b);OGATE,XR(D)::QAR2(B),XR(b)
- R(c);N_GUARD::S(G),XR(c)
- B(f);OGATE::R1(K)
- Refutation
- R(c);XS(I)
- Try
- Q(B);
- Threat
- QAB1(B)
- Vars
- P(d);OGATE::P(C),XP(d),EP
- Refutation
- R(c);XS(I)
- Try
- Q(B);
- Vars
- R(b);N_SPINR(b),OGATE,XR(D)::QAR2(B),XR(b)
- R(c);N_GUARD::S(G),XR(c)
- B(f);OGATE::R1(K)
- P(d);OGATE::P(C),XP(d),EP
- P(d);OGATE::P(C),XP(d)
- Refutation
- R(c);XS(I)
- Try
- Q(B);
- Vars
- R(b);N_SPINR(b),OGATE,XR(D)::QAR2(B),XR(b)
- R(c);N_GUARD::S(G),XR(c)
- B(f);OGATE::R1(K)
- P(d);OGATE::P(C),XP(d),EP
- P(d);OGATE::P(C),XP(d)
- Refutation
- R(c);XS(I)
- Try
- P(F);
- Vars
- R(c);N_GUARD,XS(I)::S(G)
- R(c);N_GUARD::S(G),XR(c)
- B(f);OGATE::R1(K)
- P(d);OGATE::P(C),XP(d),EP
- P(d);OGATE::P(C),XP(d)
- Refutation
- R(b);N_SPINR(b),XR(D)
- Try
- Actual
- R(D);
- Vars
- R(b);CHECK,N_SPINR(b),OGATE,XR(D)::QAR(B),XR(b)
- R(c);N_GUARD,XS(I)::S(G)
- R(b);OGATEB::R(D),XR(b)
- R(c);N_GUARD::S(G),XR(c)
- B(f);OGATE::R1(K)
- P(d);OGATE::P(C),XP(d),EP
- P(d);OGATE::P(C),XP(d)
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).