MESON Chess Problem Database
Problem Display
PID: 196695 (8/p7/Kbp1B3/2p2p2/3p3Q/1N1k2PN/2pPb1P1/2BnR3 w - - 0 1)
Langstaff, William A
Morning Post, 1919
#2
10 + 10
| 6490 | yacpdb | 2019 |
SOLUTION
- SOUND
- Sets
- 1...Bf1
- 2.Sf4#
- 1...Bf3
- 2.Sf4#
- 1...Bg4
- 2.Sf4#
- 1...Bh5
- 2.Sf4#
- 1...Ba5
- 2.Sxc5#
- 1...Bc7
- 2.Sxc5#
- 1...Bd8
- 2.Sxc5#
- 1...Sb2
- 2.Sf2#
- 1...Sf2
- 2.Sxf2#
- 1...Sc3
- 2.Sf2#
- 1...Se3
- 2.Sf2#
- 1...c4
- 2.Bxf5#
- 1...f4
- 2.Qh7#
- 1...Bf1
- Tries
- 1.Sa5?
- threat
- 2.Bc4#
- 2.Bxf5#
- 1...f4
- 2.Bf5#
- 2.Qh7#
- 1...Bf3
- 2.Sf4#
- 2.Bc4#
- 1...Bg4
- 2.Sf4#
- 2.Bc4#
- 1...Sb2
- 2.Sf2#
- 2.Bxf5#
- 1...Sf2
- 2.Sxf2#
- 2.Bc4#
- 1...Sc3
- 2.Sf2#
- 2.Bc4#
- 1...Se3
- 2.Sf2#
- 1...c4
- 2.Bxc4#
- 2.Bxf5#
- 1...Bxa5!
- threat
- 1.Bd5?
- threat
- 2.Sf4#
- 1...Bc7
- 2.Sxc5#
- 1...f4
- 2.Sxf4#
- 2.Qh7#
- 1...cxd5!
- threat
- 1.Bf7?
- 1...f4
- 2.Qh7#
- 1...Bf1
- 2.Sf4#
- 1...Bf3
- 2.Sf4#
- 1...Bg4
- 2.Sf4#
- 1...Bh5
- 2.Sf4#
- 1...Ba5
- 2.Sxc5#
- 1...Bc7
- 2.Sxc5#
- 1...Bd8
- 2.Sxc5#
- 1...Sb2
- 2.Sf2#
- 1...Sf2
- 2.Sxf2#
- 1...Sc3
- 2.Sf2#
- 1...Se3
- 2.Sf2#
- 1...c4!
- 1...f4
- 1.Bg8?
- 1...f4
- 2.Qh7#
- 1...Bf1
- 2.Sf4#
- 1...Bf3
- 2.Sf4#
- 1...Bg4
- 2.Sf4#
- 1...Bh5
- 2.Sf4#
- 1...Ba5
- 2.Sxc5#
- 1...Bc7
- 2.Sxc5#
- 1...Bd8
- 2.Sxc5#
- 1...Sb2
- 2.Sf2#
- 1...Sf2
- 2.Sxf2#
- 1...Sc3
- 2.Sf2#
- 1...Se3
- 2.Sf2#
- 1...c4!
- 1...f4
- 1.Qg5?
- threat
- 2.Qxf5#
- 1...Bf3
- 2.Sf4#
- 1...Bg4
- 2.Sf4#
- 1...Sf2
- 2.Sxf2#
- 1...Sc3
- 2.Sf2#
- 1...Se3
- 2.Sf2#
- 1...f4
- 2.Qf5#
- 2.Qg6#
- 1...Ke4+!
- threat
- 1.Qf6?
- threat
- 2.Qxf5#
- 1...Bf3
- 2.Sf4#
- 1...Bg4
- 2.Sf4#
- 1...Sf2
- 2.Sxf2#
- 1...Sc3
- 2.Sf2#
- 1...Se3
- 2.Sf2#
- 1...f4
- 2.Qf5#
- 2.Qg6#
- 1...Ke4+!
- threat
- 1.Qe4+?
- 1...fxe4
- 2.Sf4#
- 1...Kxe4+!
- 1...fxe4
- 1.Qg4?
- threat
- 2.Qxe2#
- 2.Qxf5#
- 1...Bxg4
- 2.Sf4#
- 1...f4
- 2.Qxe2#
- 2.Qf5#
- 2.Qg6#
- 1...Bf3
- 2.Sf4#
- 1...Bf1
- 2.Sf4#
- 2.Qxf5#
- 1...Sf2
- 2.Sxf2#
- 2.Qxe2#
- 1...Sc3
- 2.Sf2#
- 1...Se3
- 2.Sf2#
- 1...fxg4!
- threat
- 1.Qh5?
- threat
- 2.Qxe2#
- 2.Qxf5#
- 1...Bxh5
- 2.Sf4#
- 1...Bf3
- 2.Sf4#
- 1...Bf1
- 2.Sf4#
- 2.Qxf5#
- 1...Bg4
- 2.Sf4#
- 1...Sf2
- 2.Sxf2#
- 2.Qxe2#
- 1...Sc3
- 2.Sf2#
- 1...Se3
- 2.Sf2#
- 1...f4
- 2.Qxe2#
- 2.Qg6#
- 2.Qf5#
- 2.Qh7#
- 1...Ke4+!
- threat
- 1.Qh6?
- 1...Bf3
- 2.Sf4#
- 1...Bf1
- 2.Sf4#
- 1...Bg4
- 2.Sf4#
- 1...Bh5
- 2.Sf4#
- 1...Ba5
- 2.Sxc5#
- 1...Bc7
- 2.Sxc5#
- 1...Bd8
- 2.Sxc5#
- 1...Sb2
- 2.Sf2#
- 1...Sf2
- 2.Sxf2#
- 1...Sc3
- 2.Sf2#
- 1...Se3
- 2.Sf2#
- 1...c4
- 2.Bxf5#
- 1...f4
- 2.Qg6#
- 2.Qh7#
- 1...Ke4+!
- 1...Bf3
- 1.Qh7?
- threat
- 2.Qxf5#
- 1...Bf3
- 2.Sf4#
- 1...Bg4
- 2.Sf4#
- 1...Sf2
- 2.Sxf2#
- 1...Sc3
- 2.Sf2#
- 1...Se3
- 2.Sf2#
- 1...Ke4+!
- threat
- 1.Qh8?
- 1...Bf3
- 2.Sf4#
- 1...Bf1
- 2.Sf4#
- 1...Bg4
- 2.Sf4#
- 1...Bh5
- 2.Sf4#
- 1...Ba5
- 2.Sxc5#
- 1...Bc7
- 2.Sxc5#
- 1...Bd8
- 2.Sxc5#
- 1...Sb2
- 2.Sf2#
- 1...Sf2
- 2.Sxf2#
- 1...Sc3
- 2.Sf2#
- 1...Se3
- 2.Sf2#
- 1...c4
- 2.Bxf5#
- 1...f4
- 2.Qh7#
- 1...Ke4+!
- 1...Bf3
- 1.g4?
- 1...Bxg4
- 2.Sf4#
- 1...fxg4
- 2.Qh7#
- 1...Bf3
- 2.Sf4#
- 1...Bf1
- 2.Sf4#
- 1...Ba5
- 2.Sxc5#
- 1...Bc7
- 2.Sxc5#
- 1...Bd8
- 2.Sxc5#
- 1...Sb2
- 2.Sf2#
- 1...Sf2
- 2.Sxf2#
- 1...Sc3
- 2.Sf2#
- 1...Se3
- 2.Sf2#
- 1...c4
- 2.Bxf5#
- 1...f4
- 2.Qh7#
- 1...Ke4+!
- 1...Bxg4
- 1.Sa5?
- Keys
- 1.Qe7!
- 1...Ke4+
- 2.Bc4#
- 1...Bc7
- 2.Sxc5#
- 1...Bf1
- 2.Sf4#
- 1...Bf3
- 2.Sf4#
- 1...Bg4
- 2.Sf4#
- 1...Bh5
- 2.Sf4#
- 1...Ba5
- 2.Sxc5#
- 1...Bd8
- 2.Sxc5#
- 1...Sb2
- 2.Sf2#
- 1...Sf2
- 2.Sxf2#
- 1...Sc3
- 2.Sf2#
- 1...Se3
- 2.Sf2#
- 1...c4
- 2.Bxf5#
- 1...f4
- 2.Qh7#
- 1...Ke4+
- 1.Qe7!
FEATURES
- Static
- TYPE = WAITER
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- B(c);::S(G)
- B(h);N_GUARD::S(E),XP(f)
- S(a);N_GUARD::S(G)
- S(a);N_GUARD::S(G),XS(a)
- P(f);SBLOCK::B(J),XP(g)
- P(g);OGATEB::QAB(H)
- Tries
- Try
- S(E);
- Threat
- DUALS(2)
- Vars
- S(a);N_GUARD::S(G)
- Refutation
- B(h);XS(E)
- Try
- B(J);
- Threat
- S(G)
- Vars
- B(h);N_GUARD::S(E),XP(f)
- Refutation
- P(i);XB(J)
- Try
- B(J);
- Vars
- P(g);OGATEB::QAB(H)
- B(c);::S(G)
- B(h);N_GUARD::S(E),XP(f)
- S(a);N_GUARD::S(G)
- S(a);N_GUARD::S(G),XS(a)
- Refutation
- P(f);
- Try
- B(J);
- Vars
- P(g);OGATEB::QAB(H)
- B(c);::S(G)
- B(h);N_GUARD::S(E),XP(f)
- S(a);N_GUARD::S(G)
- S(a);N_GUARD::S(G),XS(a)
- Refutation
- P(f);
- Try
- Q(H);
- Threat
- QAB(H),XP(g)
- Vars
- B(c);::S(G)
- S(a);N_GUARD::S(G),XS(a)
- S(a);N_GUARD::S(G)
- Refutation
- K(d);CHECK,P_SPINB(c),S_FLIGHT
- Try
- Q(H);
- Threat
- QAB(H),XP(g)
- Vars
- B(c);::S(G)
- S(a);N_GUARD::S(G),XS(a)
- S(a);N_GUARD::S(G)
- Refutation
- K(d);CHECK,P_SPINB(c),S_FLIGHT
- Try
- Q(H);CHECK
- Vars
- P(g);SBLOCK,XQ(H)::S(G)
- Refutation
- K(d);CHECK,P_SPINB(c),S_FLIGHT,XQ(H)
- Try
- Q(H);
- Threat
- DUALS(2)
- Vars
- B(c);XQ(H)::S(G)
- B(c);::S(G)
- S(a);N_GUARD::S(G)
- Refutation
- P(g);XQ(H)
- Try
- Q(H);
- Threat
- DUALS(2)
- Vars
- B(c);XQ(H)::S(G)
- B(c);::S(G)
- S(a);N_GUARD::S(G)
- Refutation
- K(d);CHECK,P_SPINB(c),S_FLIGHT
- Try
- Q(H);
- Vars
- B(c);::S(G)
- B(h);N_GUARD::S(E),XP(f)
- S(a);N_GUARD::S(G)
- S(a);N_GUARD::S(G),XS(a)
- P(f);SBLOCK::B(J),XP(g)
- Refutation
- K(d);CHECK,P_SPINB(c),S_FLIGHT
- Try
- Q(H);P_PINP(g)
- Threat
- QAB(H),XP(g)
- Vars
- B(c);::S(G)
- S(a);N_GUARD::S(G),XS(a)
- S(a);N_GUARD::S(G)
- Refutation
- K(d);CHECK,P_SPINB(c),S_FLIGHT
- Try
- Q(H);
- Vars
- B(c);::S(G)
- B(h);N_GUARD::S(E),XP(f)
- S(a);N_GUARD::S(G)
- S(a);N_GUARD::S(G),XS(a)
- P(f);SBLOCK::B(J),XP(g)
- P(g);OGATEB::QAB(H)
- Refutation
- K(d);CHECK,P_SPINB(c),S_FLIGHT
- Try
- P(F);
- Vars
- B(c);XP(F)::S(G)
- P(g);OGATEB,XP(F)::QAB(H)
- B(c);::S(G)
- B(h);N_GUARD::S(E),XP(f)
- S(a);N_GUARD::S(G)
- S(a);N_GUARD::S(G),XS(a)
- P(f);SBLOCK::B(J),XP(g)
- P(g);OGATEB::QAB(H)
- Refutation
- K(d);CHECK,P_SPINB(c),S_FLIGHT
- Try
- Actual
- Q(H);
- Vars
- K(d);CHECK,P_SPINB(c),S_FLIGHT::QAR(H)+B(J)
- B(h);N_GUARD::S(E),XP(f)
- B(c);::S(G)
- S(a);N_GUARD::S(G)
- S(a);N_GUARD::S(G),XS(a)
- P(f);SBLOCK::B(J),XP(g)
- P(g);OGATEB::QAB(H)
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).