MESON Chess Problem Database
Problem Display
PID: 183242 (8/4N3/3r1p2/Qpn1RP2/2Bk2P1/1P2R2P/1b1Np2B/4K1n1 w - - 0 1)
Anonymous
Philadelphia Inquirer, 1907
#2
12 + 8
| 6490 | yacpdb | 2018 |
SOLUTION
- SOUND
- Sets
- 1...Rd5
- 2.Sc6#
- 1...Rc6
- 2.Sxc6#
- 1...Rd7
- 2.Sc6#
- 1...Rd8
- 2.Sc6#
- 1...Ba1
- 2.Qxa1#
- 1...Bc1
- 2.Qc3#
- 1...Ba3
- 2.Qc3#
- 1...Bc3
- 2.Qxc3#
- 1...Sf3+
- 2.Sxf3#
- 1...Sxh3
- 2.Sf3#
- 1...Sxb3
- 2.Rd3#
- 2.R3e4#
- 1...Sd3+
- 2.Rxd3#
- 1...Sa4
- 2.Rd3#
- 2.R3e4#
- 1...Se4
- 2.Rd3#
- 2.R3xe4#
- 1...Sa6
- 2.Rd3#
- 2.R3e4#
- 1...Se6
- 2.Rd3#
- 2.R3e4#
- 1...Sb7
- 2.Rd3#
- 2.R3e4#
- 1...Sd7
- 2.Rd3#
- 2.R3e4#
- 1...bxc4
- 2.Qxc5#
- 1...b4
- 2.Qxc5#
- 1...Rd5
- Tries
- 1.Bxg1?
- threat
- 2.Sf3#
- 2.Rxe2#
- 2.R3e4#
- 1...Sxb3
- 2.Rxe2#
- 2.R3e4#
- 1...bxc4
- 2.Sf3#
- 2.Qxc5#
- 1...Se4
- 2.Sf3#
- 2.R3xe4#
- 1...Bc3
- 2.Rxe2#
- 2.R3e4#
- 2.Qxc3#
- 1...b4
- 2.Sf3#
- 2.Qxc5#
- 1...Sd3+!
- threat
- 1.Bf4?
- 1...Sf3+
- 2.Sxf3#
- 1...Sd3+
- 2.Rxd3#
- 1...Sxh3
- 2.Sf3#
- 1...Sxb3
- 2.Rd3#
- 2.R3e4#
- 1...bxc4
- 2.Qxc5#
- 1...Rd5
- 2.Sc6#
- 2.Rxd5#
- 1...Ra6
- 2.Rd5#
- 1...Rb6
- 2.Rd5#
- 1...Rc6
- 2.Sxc6#
- 2.Rd5#
- 1...Re6
- 2.Rd5#
- 1...Rd7
- 2.Sc6#
- 1...Rd8
- 2.Sc6#
- 1...Ba1
- 2.Qxa1#
- 1...Bc1
- 2.Qc3#
- 1...Ba3
- 2.Qc3#
- 1...Bc3
- 2.Qxc3#
- 1...Sa4
- 2.Rd3#
- 2.R3e4#
- 1...Se4
- 2.Rd3#
- 2.R3xe4#
- 1...Sa6
- 2.Rd3#
- 2.R3e4#
- 1...Se6
- 2.Rd3#
- 2.R3e4#
- 1...Sb7
- 2.Rd3#
- 2.R3e4#
- 1...Sd7
- 2.Rd3#
- 2.R3e4#
- 1...b4
- 2.Qxc5#
- 1...fxe5!
- 1...Sf3+
- 1.Bxe2?
- threat
- 2.Qb4#
- 1...Sf3+
- 2.Sxf3#
- 1...Sd3+
- 2.Rxd3#
- 1...Se4
- 2.Rd3#
- 2.R3xe4#
- 1...Ba3
- 2.Qc3#
- 1...Bc3
- 2.Qxc3#
- 1...Sa6
- 2.Rd3#
- 2.R3e4#
- 1...b4
- 2.Qxb4#
- 2.Qxc5#
- 1...fxe5!
- threat
- 1.Bxb5?
- threat
- 2.Qb4#
- 1...Sf3+
- 2.Sxf3#
- 1...Sd3+
- 2.Rxd3#
- 1...Se4
- 2.Rd3#
- 2.R3xe4#
- 1...Ba3
- 2.Qc3#
- 1...Bc3
- 2.Qxc3#
- 1...Sa6
- 2.Rd3#
- 2.R3e4#
- 1...fxe5!
- threat
- 1.Rf3?
- 1...Sxf3+
- 2.Sxf3#
- 1...Sd3+
- 2.Rxd3#
- 1...Sxb3
- 2.Rd3#
- 1...bxc4
- 2.Qxc5#
- 1...fxe5
- 2.Bxg1#
- 1...Rd5
- 2.Sc6#
- 2.Rxd5#
- 1...Ra6
- 2.Rd5#
- 1...Rb6
- 2.Rd5#
- 1...Rc6
- 2.Sxc6#
- 2.Rd5#
- 1...Re6
- 2.Rd5#
- 1...Rd7
- 2.Sc6#
- 1...Rd8
- 2.Sc6#
- 1...Ba1
- 2.Qxa1#
- 1...Bc1
- 2.Qc3#
- 1...Ba3
- 2.Qc3#
- 1...Bc3
- 2.Qxc3#
- 1...Sa4
- 2.Rd3#
- 1...Se4
- 2.Rd3#
- 1...Sa6
- 2.Rd3#
- 1...Se6
- 2.Rd3#
- 1...Sb7
- 2.Rd3#
- 1...Sd7
- 2.Rd3#
- 1...b4
- 2.Qxc5#
- 1...Sxh3!
- 1...Sxf3+
- 1.Qb4?
- threat
- 2.Bxe2#
- 2.Bd3#
- 2.Bxb5#
- 2.Bd5#
- 2.Be6#
- 2.Bf7#
- 2.Bg8#
- 2.Qxc5#
- 1...Sf3+
- 2.Sxf3#
- 1...Sd3+
- 2.Bxd3#
- 2.Rxd3#
- 1...Sxb3
- 2.Sxb3#
- 2.Bxe2#
- 2.Bxb3#
- 2.Bd3#
- 2.Bxb5#
- 2.Bd5#
- 2.Be6#
- 2.Bf7#
- 2.Bg8#
- 2.Rd3#
- 2.R3e4#
- 2.R5e4#
- 2.Qxd6#
- 1...bxc4
- 2.Qxc5#
- 2.Qxc4#
- 1...Se4
- 2.Rd3#
- 2.R3xe4#
- 2.R5xe4#
- 1...Rd5
- 2.Sc6#
- 2.Bxe2#
- 2.Bd3#
- 2.Bxb5#
- 2.Bxd5#
- 1...Rc6
- 2.Sxc6#
- 2.Bxe2#
- 2.Bd3#
- 2.Bxb5#
- 2.Bd5#
- 2.Be6#
- 2.Bf7#
- 2.Bg8#
- 1...Re6
- 2.Bxe2#
- 2.Bd3#
- 2.Bxb5#
- 2.Bd5#
- 2.Bxe6#
- 2.Qxc5#
- 1...Ba3
- 2.Qc3#
- 1...Bc3
- 2.Qxc3#
- 2.Qxc5#
- 1...Sa4
- 2.Bxe2#
- 2.Bd3#
- 2.Bxb5#
- 2.Bd5#
- 2.Be6#
- 2.Bf7#
- 2.Bg8#
- 2.Rd3#
- 2.R3e4#
- 2.R5e4#
- 2.Qxd6#
- 1...Sa6
- 2.Rd3#
- 2.R3e4#
- 2.R5e4#
- 2.Qxd6#
- 1...Se6
- 2.Bxe2#
- 2.Bd3#
- 2.Bxb5#
- 2.Bd5#
- 2.Bxe6#
- 2.Rd3#
- 2.R3e4#
- 2.R5e4#
- 2.Qxd6#
- 1...Sb7
- 2.Bxe2#
- 2.Bd3#
- 2.Bxb5#
- 2.Bd5#
- 2.Be6#
- 2.Bf7#
- 2.Bg8#
- 2.Rd3#
- 2.R3e4#
- 2.R5e4#
- 1...Sd7
- 2.Bxe2#
- 2.Bd3#
- 2.Bxb5#
- 2.Bd5#
- 2.Be6#
- 2.Bf7#
- 2.Bg8#
- 2.Rd3#
- 2.R3e4#
- 2.R5e4#
- 2.Qxd6#
- 1...fxe5!
- threat
- 1.Qb6?
- threat
- 2.Rd3#
- 2.R5e4#
- 2.Qxc5#
- 2.Qxd6#
- 1...Sf3+
- 2.Sxf3#
- 1...bxc4
- 2.R5e4#
- 2.Qxc5#
- 2.Qxd6#
- 1...fxe5
- 2.Rd3#
- 1...Rd5
- 2.Sc6#
- 2.Rd3#
- 2.R5e4#
- 1...Rc6
- 2.Sxc6#
- 2.Rd3#
- 2.R5e4#
- 1...Re6
- 2.Rd3#
- 2.Qxc5#
- 1...Rd7
- 2.Sc6#
- 2.Rd3#
- 2.R5e4#
- 2.Qxc5#
- 1...Rd8
- 2.Sc6#
- 2.Rd3#
- 2.R5e4#
- 2.Qxc5#
- 1...Ba3
- 2.Rd3#
- 2.R5e4#
- 2.Qxd6#
- 1...Rxb6!
- threat
- 1.Qc7?
- threat
- 2.Qxd6#
- 2.Qxc5#
- 1...Sf3+
- 2.Sxf3#
- 1...Sd3+
- 2.Rxd3#
- 1...Sxb3
- 2.Sxb3#
- 2.Rd3#
- 2.R5e4#
- 2.Qxd6#
- 1...Se4
- 2.Rd3#
- 2.R5xe4#
- 1...Rd5
- 2.Sc6#
- 1...Ra6
- 2.Qxc5#
- 1...Rb6
- 2.Qxc5#
- 1...Rc6
- 2.Sxc6#
- 1...Re6
- 2.Qxc5#
- 1...Rd7
- 2.Sc6#
- 2.Qxc5#
- 1...Rd8
- 2.Sc6#
- 2.Qxc5#
- 1...Ba3
- 2.Qxd6#
- 1...Sa4
- 2.Rd3#
- 2.R5e4#
- 2.Qxd6#
- 1...Sa6
- 2.Rd3#
- 2.R5e4#
- 2.Qxd6#
- 1...Se6
- 2.Rd3#
- 2.R5e4#
- 2.Qxd6#
- 1...Sb7
- 2.Rd3#
- 2.R5e4#
- 1...Sd7
- 2.Rd3#
- 2.R5e4#
- 2.Qxd6#
- 1...fxe5!
- threat
- 1.Qd8?
- threat
- 2.Sc6#
- 2.Qxd6#
- 1...Sf3+
- 2.Sxf3#
- 1...Sd3+
- 2.Rxd3#
- 1...Rxd8
- 2.Sc6#
- 1...Se4
- 2.Rd3#
- 1...Rd5
- 2.Sc6#
- 2.Qxd5#
- 1...Rd7
- 2.Sc6#
- 1...Sb7
- 2.Sc6#
- 2.Rd3#
- 1...Sd7
- 2.Rd3#
- 1...fxe5!
- threat
- 1.Qa7?
- threat
- 2.Rd3#
- 2.R5e4#
- 2.Qxc5#
- 1...Sf3+
- 2.Sxf3#
- 1...bxc4
- 2.R5e4#
- 2.Qxc5#
- 1...fxe5
- 2.Rd3#
- 1...Rd5
- 2.Sc6#
- 2.Rd3#
- 2.R5e4#
- 1...Rc6
- 2.Sxc6#
- 2.Rd3#
- 2.R5e4#
- 1...Re6
- 2.Rd3#
- 2.Qxc5#
- 1...Ba3
- 2.Rd3#
- 2.R5e4#
- 1...Rb6!
- threat
- 1.Bxg1?
- Keys
- 1.Rg3!
- 1...Sf3+
- 2.Sxf3#
- 1...Sd3+
- 2.Rxd3#
- 1...Kxe5
- 2.Rd3#
- 1...Sxh3
- 2.Sf3#
- 1...Sxb3
- 2.Rd3#
- 1...bxc4
- 2.Qxc5#
- 1...fxe5
- 2.Bxg1#
- 1...Rd5
- 2.Sc6#
- 2.Rxd5#
- 1...Ra6
- 2.Rd5#
- 1...Rb6
- 2.Rd5#
- 1...Rc6
- 2.Sxc6#
- 2.Rd5#
- 1...Re6
- 2.Rd5#
- 1...Rd7
- 2.Sc6#
- 1...Rd8
- 2.Sc6#
- 1...Ba1
- 2.Qxa1#
- 1...Bc1
- 2.Qc3#
- 1...Ba3
- 2.Qc3#
- 1...Bc3
- 2.Qxc3#
- 1...Sa4
- 2.Rd3#
- 1...Se4
- 2.Rd3#
- 1...Sa6
- 2.Rd3#
- 1...Se6
- 2.Rd3#
- 1...Sb7
- 2.Rd3#
- 1...Sd7
- 2.Rd3#
- 1...b4
- 2.Qxc5#
- 1...Sf3+
- 1.Rg3!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 12
- REMOVED MATES = 2
- Sets
- R(g);N_GUARD::S(L)
- R(g);N_GUARD::S(L),XR(g)
- B(b);OGATEB::QAB(I),XB(b)
- B(b);N_GUARD::QAB1(I)
- B(b);N_GUARD,P_PINS(B)::QAB1(I),XB(b)
- S(a);CHECK,N_GUARD::S(B),XS(a)
- S(a);N_GUARD,XP(F)::S(B)
- S(f);CHECK,N_GUARD::R1(E),XS(f)
- P(e);OGATE,XB(G)::QAB1(I),XS(f)
- P(e);OGATE::QAB1(I),XS(f)
- Tries
- Try
- B(C);XS(a)
- Threat
- DUALS(3)
- Refutation
- S(f);CHECK
- Try
- B(C);
- Vars
- S(a);CHECK,N_GUARD::S(B),XS(a)
- S(f);CHECK,N_GUARD::R1(E),XS(f)
- S(a);N_GUARD,XP(F)::S(B)
- P(e);OGATE,XB(G)::QAB1(I),XS(f)
- R(g);N_GUARD::R1(J)
- R(g);N_GUARD::S(L)
- B(b);OGATEB::QAB(I),XB(b)
- B(b);N_GUARD::QAB1(I)
- B(b);N_GUARD,P_PINS(B)::QAB1(I),XB(b)
- P(e);OGATE::QAB1(I),XS(f)
- Refutation
- P(h);XR(J)
- Try
- B(G);XP(c)
- Threat
- QAR2(I)
- Vars
- S(a);CHECK,N_GUARD::S(B),XS(a)
- S(f);CHECK,N_GUARD::R1(E),XS(f)
- B(b);N_GUARD::QAB1(I)
- B(b);N_GUARD,P_PINS(B)::QAB1(I),XB(b)
- Refutation
- P(h);XR(J)
- Try
- B(G);XP(e)
- Threat
- QAR2(I)
- Vars
- S(a);CHECK,N_GUARD::S(B),XS(a)
- S(f);CHECK,N_GUARD::R1(E),XS(f)
- B(b);N_GUARD::QAB1(I)
- B(b);N_GUARD,P_PINS(B)::QAB1(I),XB(b)
- Refutation
- P(h);XR(J)
- Try
- R(E);
- Vars
- S(a);CHECK,XR(E)::S(B),XS(a)
- S(f);CHECK,N_GUARD::R1(E),XS(f)
- S(f);N_GUARD,XP(D)::R1(E)
- P(e);OGATE,XB(G)::QAB1(I),XS(f)
- P(h);SBLOCK,XR(J)::B(C),XS(a)
- R(g);N_GUARD::R1(J)
- R(g);N_GUARD::S(L)
- B(b);OGATEB::QAB(I),XB(b)
- B(b);N_GUARD::QAB1(I)
- B(b);N_GUARD,P_PINS(B)::QAB1(I),XB(b)
- S(f);N_GUARD::R1(E)
- P(e);OGATE::QAB1(I),XS(f)
- Refutation
- S(a);XP(F)
- Try
- Q(I);
- Threat
- DUALS(8)
- Vars
- S(a);CHECK,N_GUARD::S(B),XS(a)
- B(b);N_GUARD::QAB1(I)
- Refutation
- P(h);XR(J)
- Try
- Q(I);P_PINS(f)
- Threat
- DUALS(4)
- Vars
- S(a);CHECK,N_GUARD::S(B),XS(a)
- P(h);XR(J)::R1(E)
- Refutation
- R(g);N_SPINS(f),XQ(I)
- Try
- Q(I);
- Threat
- DUALS(2)
- Vars
- S(a);CHECK,N_GUARD::S(B),XS(a)
- S(f);CHECK,N_GUARD::R1(E),XS(f)
- R(g);N_GUARD::S(L)
- R(g);::QAB1(I),XS(f)
- R(g);N_GUARD::S(L),XR(g)
- B(b);::QAR2(I),XR(g)
- Refutation
- P(h);XR(J)
- Try
- Q(I);P_PINR(g)
- Threat
- DUALS(2)
- Vars
- S(a);CHECK,N_GUARD::S(B),XS(a)
- S(f);CHECK,N_GUARD::R1(E),XS(f)
- R(g);N_SPINR(g),XQ(I)::S(L)
- S(f);N_GUARD::R1(E)
- R(g);::S(L)
- S(f);N_GUARD,N_SPINR(g)::R1(E)
- Refutation
- P(h);XR(J)
- Try
- Q(I);P_PINS(f)
- Threat
- DUALS(3)
- Vars
- S(a);CHECK,N_GUARD::S(B),XS(a)
- P(h);XR(J)::R1(E)
- Refutation
- R(g);N_SPINS(f)
- Try
- Actual
- R(E);
- Vars
- S(a);CHECK,N_GUARD::S(B),XS(a)
- S(f);CHECK,N_GUARD::R1(E),XS(f)
- K(d);S_FLIGHT,XR(J)::B(C)+R(E)
- S(a);N_GUARD,XP(F)::S(B)
- S(f);N_GUARD,XP(D)::R1(E)
- P(e);OGATE,XB(G)::QAB1(I),XS(f)
- P(h);SBLOCK,XR(J)::B(C),XS(a)
- R(g);N_GUARD::R1(J)
- R(g);N_GUARD::S(L)
- B(b);OGATEB::QAB(I),XB(b)
- B(b);N_GUARD::QAB1(I)
- B(b);N_GUARD,P_PINS(B)::QAB1(I),XB(b)
- S(f);N_GUARD::R1(E)
- P(e);OGATE::QAB1(I),XS(f)
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).