MESON Chess Problem Database
Problem Display
PID: 3012 (1Qn5/3p4/3p2N1/3pPk2/5NpP/4R3/1p2P1Bp/b6K w - - 0 1)
Williams, Philip Hamilton
Source?, 1916
#2
9 + 9
| 2681 | All Change Here! | 1919 |
SOLUTION
- SOUND
- Sets
- 1...Sb6
- 2.Qf8#
- 1...Sa7
- 2.Qf8#
- 1...Se7
- 2.Qf8#
- 1...b1Q+
- 2.Qxb1#
- 1...b1S
- 2.Qxb1#
- 1...b1B
- 2.Qxb1#
- 1...b1R+
- 2.Qxb1#
- 1...g3
- 2.Bh3#
- 1...d4
- 2.Be4#
- 1...dxe5
- 2.Qxe5#
- 1...Sb6
- Tries
- 1.Kxh2?
- 1...dxe5
- 2.Qxe5#
- 1...b1Q
- 2.Qxb1#
- 1...b1S
- 2.Qxb1#
- 1...b1B
- 2.Qxb1#
- 1...b1R
- 2.Qxb1#
- 1...Sb6
- 2.Qf8#
- 1...Sa7
- 2.Qf8#
- 1...Se7
- 2.Qf8#
- 1...d4
- 2.Be4#
- 1...g3+!
- 1...dxe5
- 1.Se7+?
- 1...Sxe7
- 2.Qf8#
- 1...Kxf4!
- 1...Sxe7
- 1.Bf1?
- 1...dxe5
- 2.Qxe5#
- 1...g3
- 2.Bh3#
- 1...b1Q
- 2.Qxb1#
- 1...b1S
- 2.Qxb1#
- 1...b1B
- 2.Qxb1#
- 1...b1R
- 2.Qxb1#
- 1...Sb6
- 2.Qf8#
- 1...Sa7
- 2.Qf8#
- 1...Se7
- 2.Qf8#
- 1...d4!
- 1...dxe5
- 1.Bxd5?
- threat
- 2.Be4#
- 1...b1Q+
- 2.Qxb1#
- 1...b1R+
- 2.Qxb1#
- 1...dxe5
- 2.Qxe5#
- 1...b1B
- 2.Qxb1#
- 1...g3!
- threat
- 1.Rg3?
- 1...b1Q+
- 2.Qxb1#
- 1...b1R+
- 2.Qxb1#
- 1...dxe5
- 2.Qxe5#
- 1...b1S
- 2.Qxb1#
- 1...b1B
- 2.Qxb1#
- 1...Sb6
- 2.Qf8#
- 1...Sa7
- 2.Qf8#
- 1...Se7
- 2.Qf8#
- 1...d4!
- 1...b1Q+
- 1.Qb3?
- threat
- 2.Qc2#
- 2.Qd3#
- 1...b1Q+
- 2.Qxb1#
- 1...b1R+
- 2.Qxb1#
- 1...g3
- 2.Bh3#
- 1...b1B
- 2.Qxb1#
- 1...d4
- 2.Be4#
- 2.Qf7#
- 2.Qd3#
- 1...dxe5!
- threat
- 1.Qb5?
- threat
- 2.Qd3#
- 2.Qxd7#
- 1...b1Q+
- 2.Qxb1#
- 1...b1R+
- 2.Qxb1#
- 1...g3
- 2.Bh3#
- 2.Qxd7#
- 1...b1B
- 2.Qxd7#
- 2.Qxb1#
- 1...Sb6
- 2.Qd3#
- 1...dxe5!
- threat
- 1.Kxh2?
- Keys
- 1.Qb4!
- 1...b1Q+
- 2.Qxb1#
- 1...b1R+
- 2.Qxb1#
- 1...dxe5
- 2.Qf8#
- 1...g3
- 2.Bh3#
- 1...b1S
- 2.Qxb1#
- 1...b1B
- 2.Qxb1#
- 1...d4
- 2.Be4#
- 1...Sb6
- 2.Se7#
- 1...Sa7
- 2.Se7#
- 1...Se7
- 2.Sxe7#
- 1...b1Q+
- 1.Qb4!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 4
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- S(i);OGATE::QAR(I)
- P(b);CHECK,OGATE::QAB(I),XQ(b)
- P(b);OGATE::QAB(I),XS(b)
- P(b);OGATE::QAB(I),XB(b)
- P(b);CHECK,OGATE::QAB(I),XR(b)
- P(d);OGATEB::B(C)
- P(e);N_GUARD::B(C)
- P(g);OGATE,XP(G)::QAR1(I),XP(g)
- Tries
- Try
- K(A);P-FLIGHT,XP(c)
- Vars
- P(g);OGATE,XP(G)::QAR1(I),XP(g)
- P(b);OGATE::QAB(I),XQ(b)
- P(b);OGATE::QAB(I),XS(b)
- P(b);OGATE::QAB(I),XB(b)
- P(b);OGATE::QAB(I),XR(b)
- S(i);OGATE::QAR(I)
- P(e);N_GUARD::B(C)
- Refutation
- P(d);CHECK
- Try
- S(H);CHECK
- Vars
- S(i);OGATE,XS(H)::QAR(I)
- Refutation
- K(f);P-FLIGHT,XS(E)
- Try
- B(C);
- Vars
- P(g);OGATE,XP(G)::QAR1(I),XP(g)
- P(d);OGATEB::B(C)
- P(b);OGATE,P_PINB(C)::QAB(I),XQ(b)
- P(b);OGATE::QAB(I),XS(b)
- P(b);OGATE::QAB(I),XB(b)
- P(b);OGATE,P_PINB(C)::QAB(I),XR(b)
- S(i);OGATE::QAR(I)
- Refutation
- P(e);
- Try
- B(C);XP(e)
- Threat
- B(C)
- Vars
- P(b);CHECK,OGATE::QAB(I),XQ(b)
- P(b);CHECK,OGATE::QAB(I),XR(b)
- P(g);OGATE,XP(G)::QAR1(I),XP(g)
- P(b);OGATE::QAB(I),XB(b)
- Refutation
- P(d);
- Try
- R(D);
- Vars
- P(b);CHECK,OGATE::QAB(I),XQ(b)
- P(b);CHECK,OGATE::QAB(I),XR(b)
- P(g);OGATE,XP(G)::QAR1(I),XP(g)
- P(b);OGATE::QAB(I),XS(b)
- P(b);OGATE::QAB(I),XB(b)
- S(i);OGATE::QAR(I)
- Refutation
- P(e);
- Try
- Q(I);
- Threat
- DUALS(2)
- Vars
- P(b);CHECK,OGATE::QAB(I),XQ(b)
- P(b);CHECK,OGATE::QAB(I),XR(b)
- P(d);OGATEB::B(C)
- P(b);OGATE::QAB(I),XB(b)
- Refutation
- P(g);XP(G)
- Try
- Q(I);
- Threat
- DUALS(2)
- Vars
- P(b);CHECK,OGATE::QAB(I),XQ(b)
- P(b);CHECK,OGATE::QAB(I),XR(b)
- S(i);::QAB(I)
- Refutation
- P(g);XP(G)
- Try
- Actual
- Q(I);
- Vars
- P(b);CHECK,OGATE::QAB(I),XQ(b)
- P(b);CHECK,OGATE::QAB(I),XR(b)
- P(g);OGATE,XP(G)::QAR(I)
- P(d);OGATEB::B(C)
- P(b);OGATE::QAB(I),XS(b)
- P(b);OGATE::QAB(I),XB(b)
- P(e);N_GUARD::B(C)
- S(i);N_GUARD::S(H)
- S(i);N_GUARD::S(H),XS(i)
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).