MESON Chess Problem Database
Problem Display
PID: 175815 (8/6Q1/4b3/4p2r/4NpNp/1n3k1K/8/4R3 w - - 0 1)
McAllister, George W
Philadelphia Times, 1898
#2
5 + 7
| 6490 | yacpdb | 2018 |
SOLUTION
- SOUND
- Sets
- 1...Rf5
- 2.Sh2#
- 1...Rg5
- 2.Sxg5#
- 1...Rh6
- 2.Sg5#
- 1...Rh7
- 2.Sg5#
- 1...Rh8
- 2.Sg5#
- 1...Bc4
- 2.Sh2#
- 1...Bxg4+
- 2.Qxg4#
- 1...Bd5
- 2.Sh2#
- 1...Bf7
- 2.Sh2#
- 1...Bg8
- 2.Sh2#
- 1...Sa1
- 2.Sd2#
- 1...Sc1
- 2.Sd2#
- 1...Sd2
- 2.Sxd2#
- 1...Sd4
- 2.Sd2#
- 1...Sa5
- 2.Sd2#
- 1...Sc5
- 2.Sd2#
- 1...Rf5
- Tries
- 1.Qa7?
- threat
- 2.Qf2#
- 1...Sd4
- 2.Sd2#
- 1...Sc5
- 2.Sd2#
- 1...Bxg4+!
- threat
- 1.Qb7?
- threat
- 2.Sd2#
- 2.Sg5#
- 1...Rg5
- 2.Sd2#
- 2.Sxg5#
- 1...Bd5
- 2.Sh2#
- 1...Sd2
- 2.Sxd2#
- 2.Sg5#
- 1...Bxg4+!
- threat
- 1.Qc7?
- threat
- 2.Qc3#
- 1...Bc4
- 2.Sh2#
- 1...Sc1
- 2.Sd2#
- 1...Sc5
- 2.Sd2#
- 1...Bxg4+!
- threat
- 1.Qd7?
- threat
- 2.Qd1#
- 2.Qd3#
- 1...Bxg4+
- 2.Qxg4#
- 1...Bc4
- 2.Sh2#
- 1...Bd5
- 2.Sh2#
- 1...Sc1
- 2.Sd2#
- 1...Sd2
- 2.Sxd2#
- 2.Qd3#
- 1...Sd4
- 2.Sd2#
- 1...Sc5
- 2.Sd2#
- 2.Qd1#
- 1...Bxd7!
- threat
- 1.Qf7?
- threat
- 2.Re3#
- 1...Bxf7
- 2.Sh2#
- 1...Bf5
- 2.Qxb3#
- 1...Rf5
- 2.Sh2#
- 1...Bxg4+!
- threat
- 1.Qa7?
- Keys
- 1.Qg8!
- 1...Bxg4+
- 2.Qxg4#
- 1...Bxg8
- 2.Sh2#
- 1...Bf5
- 2.Qxb3#
- 1...Rf5
- 2.Sh2#
- 1...Rg5
- 2.Sxg5#
- 1...Rh6
- 2.Sg5#
- 1...Rh7
- 2.Sg5#
- 1...Rh8
- 2.Sg5#
- 1...Bc4
- 2.Sh2#
- 1...Bd5
- 2.Sh2#
- 1...Bd7
- 2.Qxb3#
- 1...Bf7
- 2.Sh2#
- 1...Bc8
- 2.Qxb3#
- 1...Sa1
- 2.Sd2#
- 1...Sc1
- 2.Sd2#
- 1...Sd2
- 2.Sxd2#
- 1...Sd4
- 2.Sd2#
- 1...Sa5
- 2.Sd2#
- 1...Sc5
- 2.Sd2#
- 1...Bxg4+
- 1.Qg8!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 0
- Sets
- R(f);N_PINS(D)::S(D)
- R(f);N_GUARD::S(C),XR(f)
- R(f);N_GUARD::S(C)
- B(g);N_PINS(D)::S(D)
- B(g);CHECK,OGATE,XS(D)::QAB1(E),XB(g)
- S(a);N_GUARD::S(C)
- S(a);N_GUARD::S(C),XS(a)
- Tries
- Try
- Q(E);
- Threat
- QAR1(E)
- Vars
- S(a);N_GUARD::S(C)
- Refutation
- B(g);CHECK,XS(D)
- Try
- Q(E);
- Threat
- DUALS(2)
- Vars
- B(g);N_PINS(D)::S(D)
- Refutation
- B(g);CHECK,XS(D)
- Try
- Q(E);
- Threat
- QAR(E)
- Vars
- B(g);N_PINS(D)::S(D)
- S(a);N_GUARD::S(C)
- Refutation
- B(g);CHECK,XS(D)
- Try
- Q(E);
- Threat
- DUALS(2)
- Vars
- B(g);CHECK,OGATE,XS(D)::QAB1(E),XB(g)
- B(g);N_PINS(D)::S(D)
- S(a);N_GUARD::S(C)
- Refutation
- B(g);XQ(E)
- Try
- Q(E);P_PINP(c)
- Threat
- R1(A)
- Vars
- B(g);N_PINS(D),N_SPINP(c),XQ(E)::S(D)
- B(g);N_SPINP(c),OGATE::QAR(E),XS(a)
- R(f);N_PINS(D),N_SPINP(c)::S(D)
- Refutation
- B(g);CHECK,XS(D)
- Try
- Actual
- Q(E);
- Vars
- B(g);CHECK,OGATE,XS(D)::QAB1(E),XB(g)
- B(g);N_PINS(D),XQ(E)::S(D)
- B(g);OGATE::QAR(E),XS(a)
- R(f);N_PINS(D)::S(D)
- R(f);N_GUARD::S(C),XR(f)
- R(f);N_GUARD::S(C)
- B(g);N_PINS(D)::S(D)
- S(a);N_GUARD::S(C)
- S(a);N_GUARD::S(C),XS(a)
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).