MESON Chess Problem Database
Problem Display
PID: 175606 (2Br4/2Q2p2/N7/3kpr2/5P1p/1n1P1N1K/2n5/4R3 w - - 0 1)
McAllister, George W
Philadelphia Times, 1900
#2
8 + 8
| 6490 | yacpdb | 2018 |
SOLUTION
- SOUND
- Sets
- 1...Rxf4
- 2.Rxe5#
- 1...Rf6
- 2.Rxe5#
- 1...Rd6
- 2.Qc4#
- 1...Rd7
- 2.Qxd7#
- 1...Rxc8
- 2.Qd7#
- 1...Re8
- 2.Qd7#
- 1...Rf8
- 2.Qd7#
- 1...Rg8
- 2.Qd7#
- 1...Rh8
- 2.Qd7#
- 1...Sca1
- 2.Sb4#
- 1...Sxe1
- 2.Sb4#
- 1...Sa3
- 2.Sb4#
- 1...Se3
- 2.Sb4#
- 1...Sb4
- 2.Sxb4#
- 1...Scd4
- 2.Sb4#
- 1...Sba1
- 2.Qc5#
- 1...Sc1
- 2.Qc5#
- 1...Sd2
- 2.Qc5#
- 1...Sbd4
- 2.Qc5#
- 1...Sa5
- 2.Qc5#
- 1...Sc5
- 2.Qxc5#
- 1...exf4
- 2.Bb7#
- 1...e4
- 2.dxe4#
- 1...Rxf4
- Tries
- 1.Bxf5?
- threat
- 2.Rxe5#
- 1...Sxe1
- 2.Sb4#
- 1...exf4
- 2.Re5#
- 1...Re8
- 2.Qd7#
- 1...Se3
- 2.Sb4#
- 1...e4
- 2.dxe4#
- 1...f6!
- threat
- 1.Bd7?
- threat
- 2.Qc6#
- 1...Rxd7
- 2.Qxd7#
- 1...Rf6
- 2.Rxe5#
- 2.Qxe5#
- 1...Sb4
- 2.Sxb4#
- 1...Scd4
- 2.Sb4#
- 1...Sbd4
- 2.Qc5#
- 1...Sa5
- 2.Qc5#
- 1...Rc8!
- threat
- 1.fxe5?
- threat
- 2.Qc4#
- 2.Qb7#
- 1...Rxe5
- 2.Rxe5#
- 1...Rxc8
- 2.Qd6#
- 2.Qd7#
- 1...Rd7
- 2.Qc4#
- 2.Qxd7#
- 1...Rf4
- 2.Qb7#
- 1...Rf6
- 2.Qc4#
- 1...Rd6
- 2.Qxd6#
- 2.Qc4#
- 1...Sa3
- 2.Sb4#
- 2.Qb7#
- 1...Se3
- 2.Sb4#
- 2.Qb7#
- 1...Sb4
- 2.Sxb4#
- 2.Qc4#
- 1...Scd4
- 2.Sb4#
- 2.Qc4#
- 1...Sd2
- 2.Qc5#
- 2.Qb7#
- 1...Sbd4
- 2.Qc4#
- 2.Qc5#
- 1...Sa5
- 2.Qc5#
- 1...Sc5
- 2.Qxc5#
- 1...Rxf3+!
- threat
- 1.Bxf5?
- Keys
- 1.Sd4!
- threat
- 2.Qxd8#
- 1...Kxd4
- 2.Qc4#
- 1...Rxc8
- 2.Qd7#
- 1...Scxd4
- 2.Sb4#
- 1...Sbxd4
- 2.Qc5#
- 1...exd4
- 2.Bb7#
- 1...Rf6
- 2.Qxe5#
- 1...Rd6
- 2.Qc4#
- 1...Rd7
- 2.Qxd7#
- 1...Re8
- 2.Qd7#
- 1...Rf8
- 2.Qd7#
- 1...Rg8
- 2.Qd7#
- 1...Rh8
- 2.Qd7#
- 1...Sc5
- 2.Qxc5#
- threat
- 1.Sd4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 2
- REMOVED MATES = 12
- Sets
- R(f);N_GUARD,XP(E)::R1(A),XP(e)
- R(f);N_GUARD::R1(A),XP(e)
- R(h);SBLOCK::QAB1(G)
- R(h);N_GUARD::QAR2(G),XR(h)
- R(h);N_GUARD,XB(H)::QAR2(G)
- R(h);N_GUARD::QAR2(G)
- S(a);N_GUARD::S(F)
- S(a);N_GUARD,XR(A)::S(F)
- S(a);N_GUARD::S(F),XS(a)
- S(b);N_GUARD::QAR1(G)
- S(b);N_GUARD::QAR1(G),XS(b)
- P(e);XP(E)::B(H)
- P(e);OGATE::P(B),XP(e)
- Tries
- Try
- B(H);XR(f)
- Threat
- R1(A),XP(e)
- Vars
- S(a);N_GUARD,XR(A)::S(F)
- P(e);XP(E)::R1(A)
- R(h);N_GUARD::QAR2(G)
- S(a);N_GUARD::S(F)
- P(e);OGATE::P(B),XP(e)
- Refutation
- P(g);
- Try
- B(H);
- Threat
- QAB1(G)
- Vars
- R(h);OGATE,XB(H)::QAR2(G),XR(h)
- S(a);N_GUARD::S(F),XS(a)
- S(a);N_GUARD::S(F)
- S(b);N_GUARD::QAR1(G)
- Refutation
- R(h);
- Try
- P(E);XP(e)
- Threat
- DUALS(2)
- Vars
- R(f);OGATE,XP(E)::R1(A),XR(f)
- R(f);::QAB(G)
- R(f);::QAB1(G)
- S(b);N_GUARD::QAR1(G)
- S(b);N_GUARD::QAR1(G),XS(b)
- Refutation
- R(f);CHECK,XS(C)
- Try
- Actual
- S(C);
- Threat
- QAR(G),XR(h)
- Vars
- K(d);P-FLIGHT,XS(C)::QAR1(G)
- R(h);N_GUARD,XB(H)::QAR2(G)
- S(a);N_GUARD,SBLOCK,XS(C)::S(F)
- S(b);N_GUARD,XS(C)::QAR1(G)
- P(e);SBLOCK,XS(C)::B(H)
- R(f);N_GUARD::QAR1(G),XP(e)
- R(h);SBLOCK::QAB1(G)
- R(h);N_GUARD::QAR2(G),XR(h)
- R(h);N_GUARD::QAR2(G)
- S(b);N_GUARD::QAR1(G),XS(b)
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).