MESON Chess Problem Database
Problem Display
PID: 2968 (8/2B2n2/4p3/b1k1p2K/R3B3/8/1Q6/8 w - - 0 1)
Williams, Philip Hamilton
Source?, 1914
#2
5 + 5
| 2681 | All Change Here! | 1919 |
SOLUTION
- SOUND
- Sets
- 1...Be1
- 2.Qb6#
- 1...Bd2
- 2.Qb6#
- 1...Bc3
- 2.Qb6#
- 1...Bb4
- 2.Qxb4#
- 1...Bb6
- 2.Qb4#
- 2.Qxb6#
- 1...Bxc7
- 2.Qb4#
- 1...Sg5
- 2.Qxe5#
- 1...Sd6
- 2.Qxe5#
- 1...Sh6
- 2.Qxe5#
- 1...Sd8
- 2.Qxe5#
- 1...Sh8
- 2.Qxe5#
- 1...Be1
- Tries
- 1.Kg4?
- 1...Bxc7
- 2.Qb4#
- 1...Bb4
- 2.Qxb4#
- 1...Be1
- 2.Qb6#
- 1...Bd2
- 2.Qb6#
- 1...Bc3
- 2.Qb6#
- 1...Bb6
- 2.Qb4#
- 2.Qxb6#
- 1...Sg5
- 2.Qxe5#
- 1...Sd6
- 2.Qxe5#
- 1...Sd8
- 2.Qxe5#
- 1...Sh8
- 2.Qxe5#
- 1...Sh6+!
- 1...Bxc7
- 1.Kh4?
- 1...Bxc7
- 2.Qb4#
- 1...Bb4
- 2.Qxb4#
- 1...Bd2
- 2.Qb6#
- 1...Bc3
- 2.Qb6#
- 1...Bb6
- 2.Qb4#
- 2.Qxb6#
- 1...Sg5
- 2.Qxe5#
- 1...Sd6
- 2.Qxe5#
- 1...Sh6
- 2.Qxe5#
- 1...Sd8
- 2.Qxe5#
- 1...Sh8
- 2.Qxe5#
- 1...Be1+!
- 1...Bxc7
- 1.Kg6?
- 1...Bxc7
- 2.Qb4#
- 1...Bb4
- 2.Qxb4#
- 1...Be1
- 2.Qb6#
- 1...Bd2
- 2.Qb6#
- 1...Bc3
- 2.Qb6#
- 1...Bb6
- 2.Qb4#
- 2.Qxb6#
- 1...Sg5
- 2.Qxe5#
- 1...Sd6
- 2.Qxe5#
- 1...Sh6
- 2.Qxe5#
- 1...Sd8
- 2.Qxe5#
- 1...Sh8+!
- 1...Bxc7
- 1.Bh1?
- 1...Bxc7
- 2.Qb4#
- 1...Bb4
- 2.Qxb4#
- 1...Be1
- 2.Qb6#
- 1...Bd2
- 2.Qb6#
- 1...Bc3
- 2.Qb6#
- 1...Bb6
- 2.Qb4#
- 2.Qxb6#
- 1...Sg5
- 2.Qxe5#
- 1...Sd6
- 2.Qxe5#
- 1...Sh6
- 2.Qxe5#
- 1...Sd8
- 2.Qxe5#
- 1...Sh8
- 2.Qxe5#
- 1...e4!
- 1...Bxc7
- 1.Bg2?
- 1...Bxc7
- 2.Qb4#
- 1...Bb4
- 2.Qxb4#
- 1...Be1
- 2.Qb6#
- 1...Bd2
- 2.Qb6#
- 1...Bc3
- 2.Qb6#
- 1...Bb6
- 2.Qb4#
- 2.Qxb6#
- 1...Sg5
- 2.Qxe5#
- 1...Sd6
- 2.Qxe5#
- 1...Sh6
- 2.Qxe5#
- 1...Sd8
- 2.Qxe5#
- 1...Sh8
- 2.Qxe5#
- 1...e4!
- 1...Bxc7
- 1.Bf3?
- 1...Bxc7
- 2.Qb4#
- 1...Bb4
- 2.Qxb4#
- 1...Be1
- 2.Qb6#
- 1...Bd2
- 2.Qb6#
- 1...Bc3
- 2.Qb6#
- 1...Bb6
- 2.Qb4#
- 2.Qxb6#
- 1...Sg5
- 2.Qxe5#
- 1...Sd6
- 2.Qxe5#
- 1...Sh6
- 2.Qxe5#
- 1...Sd8
- 2.Qxe5#
- 1...Sh8
- 2.Qxe5#
- 1...e4!
- 1...Bxc7
- 1.Bb7?
- 1...Bxc7
- 2.Qb4#
- 1...Bb4
- 2.Qxb4#
- 1...Be1
- 2.Qb6#
- 1...Bd2
- 2.Qb6#
- 1...Bc3
- 2.Qb6#
- 1...Bb6
- 2.Qb4#
- 2.Qxb6#
- 1...Sg5
- 2.Qxe5#
- 1...Sd6
- 2.Qxe5#
- 1...Sh6
- 2.Qxe5#
- 1...Sd8
- 2.Qxe5#
- 1...Sh8
- 2.Qxe5#
- 1...e4!
- 1...Bxc7
- 1.Ba8?
- 1...Bxc7
- 2.Qb4#
- 1...Bb4
- 2.Qxb4#
- 1...Be1
- 2.Qb6#
- 1...Bd2
- 2.Qb6#
- 1...Bc3
- 2.Qb6#
- 1...Bb6
- 2.Qb4#
- 2.Qxb6#
- 1...Sg5
- 2.Qxe5#
- 1...Sd6
- 2.Qxe5#
- 1...Sh6
- 2.Qxe5#
- 1...Sd8
- 2.Qxe5#
- 1...Sh8
- 2.Qxe5#
- 1...e4!
- 1...Bxc7
- 1.Bb6+?
- 1...Bxb6
- 2.Qb4#
- 1...Kd6!
- 1...Bxb6
- 1.Rd4?
- 1...Bxc7
- 2.Qb4#
- 1...Bc3
- 2.Bb6#
- 2.Qb6#
- 1...Bb4
- 2.Qxb4#
- 1...Be1
- 2.Bb6#
- 2.Qb6#
- 1...Bd2
- 2.Bb6#
- 2.Qb6#
- 1...Bb6
- 2.Bxb6#
- 2.Qb4#
- 2.Qxb6#
- 1...Sg5
- 2.Bd6#
- 1...Sd6
- 2.Bxd6#
- 1...Sh6
- 2.Bd6#
- 1...Sd8
- 2.Bd6#
- 1...Sh8
- 2.Bd6#
- 1...exd4!
- 1...Bxc7
- 1.Qc1+?
- 1...Kb5
- 2.Qc4#
- 2.Qc6#
- 1...Bc3!
- 1...Kb5
- 1.Qa3+?
- 1...Bb4
- 2.Qxb4#
- 1...Kb5!
- 1...Bb4
- 1.Qc3+?
- 1...Kb5
- 2.Rxa5#
- 2.Qxa5#
- 2.Qc4#
- 2.Qc6#
- 1...Bxc3!
- 1...Kb5
- 1.Qd4+?
- 1...Kb5
- 2.Rxa5#
- 2.Qc4#
- 1...exd4!
- 1...Kb5
- 1.Qc2+?
- 1...Kb5
- 2.Bd3#
- 2.Qc4#
- 2.Qc6#
- 1...Bc3!
- 1...Kb5
- 1.Qb3?
- threat
- 2.Rc4#
- 2.Qc4#
- 1...Bxc7
- 2.Qb4#
- 1...Bb4
- 2.Qxb4#
- 1...Sd6!
- threat
- 1.Qb7?
- threat
- 2.Qc6#
- 1...Bb4
- 2.Qxb4#
- 1...Sd8!
- threat
- 1.Kg4?
- Keys
- 1.Qb8!
- 1...Bxc7
- 2.Qb4#
- 1...Bb4
- 2.Qxb4#
- 1...Bb6
- 2.Qxb6#
- 1...Bc3
- 2.Qb6#
- 1...Be1
- 2.Qb6#
- 1...Bd2
- 2.Qb6#
- 1...Sg5
- 2.Bd6#
- 1...Sd6
- 2.Bxd6#
- 1...Sh6
- 2.Bd6#
- 1...Sd8
- 2.Bd6#
- 1...Sh8
- 2.Bd6#
- 1...Bxc7
- 1.Qb8!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 5
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- B(a);N_GUARD::QAB1(A)
- B(a);N_GUARD::QAB1(A),XB(a)
- B(a);N_GUARD,XB(E)::QAB1(A)
- S(e);N_GUARD::QAR2(A),XP(c)
- Tries
- Try
- K(D);S_FLIGHT
- Vars
- B(a);N_GUARD,XB(E)::QAB1(A)
- B(a);N_GUARD::QAB1(A),XB(a)
- B(a);N_GUARD::QAB1(A)
- S(e);N_GUARD::QAR2(A),XP(c)
- Refutation
- S(e);CHECK
- Try
- K(D);P-FLIGHT
- Vars
- B(a);N_GUARD,XB(E)::QAB1(A)
- B(a);N_GUARD::QAB1(A),XB(a)
- B(a);N_GUARD::QAB1(A)
- S(e);N_GUARD::QAR2(A),XP(c)
- Refutation
- B(a);CHECK
- Try
- K(D);S_FLIGHT
- Vars
- B(a);N_GUARD,XB(E)::QAB1(A)
- B(a);N_GUARD::QAB1(A),XB(a)
- B(a);N_GUARD::QAB1(A)
- S(e);N_GUARD::QAR2(A),XP(c)
- Refutation
- S(e);CHECK
- Try
- B(C);
- Vars
- B(a);N_GUARD,XB(E)::QAB1(A)
- B(a);N_GUARD::QAB1(A),XB(a)
- B(a);N_GUARD::QAB1(A)
- S(e);N_GUARD::QAR2(A),XP(c)
- Refutation
- P(c);
- Try
- B(C);
- Vars
- B(a);N_GUARD,XB(E)::QAB1(A)
- B(a);N_GUARD::QAB1(A),XB(a)
- B(a);N_GUARD::QAB1(A)
- S(e);N_GUARD::QAR2(A),XP(c)
- Refutation
- P(c);
- Try
- B(C);
- Vars
- B(a);N_GUARD,XB(E)::QAB1(A)
- B(a);N_GUARD::QAB1(A),XB(a)
- B(a);N_GUARD::QAB1(A)
- S(e);N_GUARD::QAR2(A),XP(c)
- Refutation
- P(c);
- Try
- B(C);
- Vars
- B(a);N_GUARD,XB(E)::QAB1(A)
- B(a);N_GUARD::QAB1(A),XB(a)
- B(a);N_GUARD::QAB1(A)
- S(e);N_GUARD::QAR2(A),XP(c)
- Refutation
- P(c);
- Try
- B(C);
- Vars
- B(a);N_GUARD,XB(E)::QAB1(A)
- B(a);N_GUARD::QAB1(A),XB(a)
- B(a);N_GUARD::QAB1(A)
- S(e);N_GUARD::QAR2(A),XP(c)
- Refutation
- P(c);
- Try
- B(E);CHECK
- Vars
- B(a);XB(E)::QAB1(A)
- Refutation
- K(b);S_FLIGHT
- Try
- R(B);
- Vars
- B(a);N_GUARD,XB(E)::QAB1(A)
- B(a);N_GUARD::QAB1(A),XB(a)
- S(e);N_GUARD::B(E)
- S(e);N_GUARD::B(E),XS(e)
- Refutation
- P(c);XR(B)
- Try
- Q(A);CHECK
- Refutation
- B(a);P_SPINB(a)
- Try
- Q(A);CHECK
- Vars
- B(a);N_GUARD,P_SPINB(a)::QAB1(A),XB(a)
- Refutation
- K(b);P-FLIGHT
- Try
- Q(A);CHECK
- Refutation
- B(a);XQ(A)
- Try
- Q(A);CHECK
- Refutation
- P(c);XQ(A)
- Try
- Q(A);CHECK
- Refutation
- B(a);P_SPINB(a)
- Try
- Q(A);
- Threat
- DUALS(2)
- Vars
- B(a);N_GUARD,XB(E)::QAB1(A)
- B(a);N_GUARD::QAB1(A),XB(a)
- Refutation
- S(e);
- Try
- Q(A);
- Threat
- QAR1(A)
- Vars
- B(a);N_GUARD::QAB1(A),XB(a)
- Refutation
- S(e);
- Try
- Actual
- Q(A);
- Vars
- B(a);N_GUARD,XB(E)::QAB1(A)
- B(a);N_GUARD::QAB1(A),XB(a)
- B(a);N_GUARD::QAB1(A)
- S(e);N_GUARD::B(E)
- S(e);N_GUARD::B(E),XS(e)
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).