MESON Chess Problem Database
Problem Display
PID: 3112 (3R4/1RNn4/2pk4/4pP2/3b3B/5pN1/3Q1n2/5K2 w - - 0 1)
O'Keefe, John James
Smith, William James
Source?, 1918
#2
8 + 7
| 2681 | All Change Here! | 1919 |
SOLUTION
- SOUND
- Sets
- 1...Kc5
- 2.Qb4#
- 1...Sd1
- 2.Se4#
- 1...Sh1
- 2.Se4#
- 1...Sd3
- 2.Se4#
- 1...Sh3
- 2.Se4#
- 1...Se4
- 2.Sxe4#
- 1...Sg4
- 2.Se4#
- 1...e4
- 2.Qxd4#
- 1...c5
- 2.Qh6#
- 1...Kc5
- Tries
- 1.Ke1?
- 1...Kc5
- 2.Qb4#
- 1...e4
- 2.Qxd4#
- 1...Sd1
- 2.Se4#
- 1...Sh1
- 2.Se4#
- 1...Sh3
- 2.Se4#
- 1...Se4
- 2.Sxe4#
- 1...Sg4
- 2.Se4#
- 1...c5
- 2.Qh6#
- 1...Sd3+!
- 1...Kc5
- 1.Bg5?
- 1...Kc5
- 2.Qb4#
- 1...e4
- 2.Qxd4#
- 1...Sd1
- 2.Se4#
- 1...Sh1
- 2.Se4#
- 1...Sd3
- 2.Se4#
- 1...Sh3
- 2.Se4#
- 1...Se4
- 2.Sxe4#
- 1...Sg4
- 2.Se4#
- 1...c5!
- 1...Kc5
- 1.Bf6?
- 1...Kc5
- 2.Qb4#
- 1...Sd1
- 2.Se4#
- 1...Sh1
- 2.Se4#
- 1...Sd3
- 2.Se4#
- 1...Sh3
- 2.Se4#
- 1...Se4
- 2.Sxe4#
- 1...Sg4
- 2.Se4#
- 1...e4
- 2.Qxd4#
- 1...c5!
- 1...Kc5
- 1.Ra7?
- 1...e4
- 2.Qxd4#
- 1...Sd1
- 2.Se4#
- 1...Sh1
- 2.Se4#
- 1...Sd3
- 2.Se4#
- 1...Sh3
- 2.Se4#
- 1...Se4
- 2.Sxe4#
- 1...Sg4
- 2.Se4#
- 1...c5
- 2.Qh6#
- 1...Kc5!
- 1...e4
- 1.Rxd7+?
- 1...Kc5
- 2.Qb4#
- 1...Kxd7!
- 1...Kc5
- 1.Qb4+?
- 1...c5
- 2.Qb6#
- 1...Bc5!
- 1...c5
- 1.Qa5?
- threat
- 2.Se8#
- 1...c5
- 2.Qb6#
- 2.Qa6#
- 1...Bc5!
- threat
- 1.Qg5?
- threat
- 2.Qe7#
- 1...c5
- 2.Qf6#
- 2.Qh6#
- 2.Qg6#
- 1...Kc5!
- threat
- 1.f6?
- 1...Kc5
- 2.Qb4#
- 1...e4
- 2.Qxd4#
- 1...Sd1
- 2.Se4#
- 1...Sh1
- 2.Se4#
- 1...Sd3
- 2.Se4#
- 1...Sh3
- 2.Se4#
- 1...Se4
- 2.Sxe4#
- 1...Sg4
- 2.Se4#
- 1...c5!
- 1...Kc5
- 1.Ke1?
- Keys
- 1.Qd3!
- 1...Kc5
- 2.Be7#
- 1...Sxd3
- 2.Se4#
- 1...e4
- 2.Qxd4#
- 1...c5
- 2.Qa6#
- 1...Sd1
- 2.Se4#
- 1...Sh1
- 2.Se4#
- 1...Sh3
- 2.Se4#
- 1...Se4
- 2.Sxe4#
- 1...Sg4
- 2.Se4#
- 1...Kc5
- 1.Qd3!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 2
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- K(f);N_SPINB(c),N_SPINS(g),S_FLIGHT::QAB1(B)
- S(a);N_GUARD::S(C)
- S(a);N_GUARD,N_SPINB(c)::S(C)
- S(a);N_GUARD::S(C),XS(a)
- P(d);N_GUARD::QAR2(B),XB(c)
- P(e);SBLOCK::QAR(B)
- Tries
- Try
- K(A);P-FLIGHT
- Vars
- K(f);N_SPINB(c),N_SPINS(g),S_FLIGHT::QAB1(B)
- P(d);N_GUARD::QAR2(B),XB(c)
- S(a);N_GUARD::S(C)
- S(a);N_GUARD::S(C),XS(a)
- P(e);SBLOCK::QAR(B)
- Refutation
- S(a);CHECK,N_SPINB(c)
- Try
- B(D);
- Vars
- K(f);N_SPINB(c),N_SPINS(g),S_FLIGHT::QAB1(B)
- P(d);N_GUARD::QAR2(B),XB(c)
- S(a);N_GUARD::S(C)
- S(a);N_GUARD,N_SPINB(c)::S(C)
- S(a);N_GUARD::S(C),XS(a)
- Refutation
- P(e);
- Try
- B(D);
- Vars
- K(f);N_SPINB(c),N_SPINS(g),S_FLIGHT::QAB1(B)
- S(a);N_GUARD::S(C)
- S(a);N_GUARD,N_SPINB(c)::S(C)
- S(a);N_GUARD::S(C),XS(a)
- P(d);N_GUARD::QAR2(B),XB(c)
- Refutation
- P(e);
- Try
- R(F);
- Vars
- P(d);N_GUARD::QAR2(B),XB(c)
- S(a);N_GUARD::S(C)
- S(a);N_GUARD,N_SPINB(c)::S(C)
- S(a);N_GUARD::S(C),XS(a)
- P(e);SBLOCK::QAR(B)
- Refutation
- K(f);N_SPINB(c),N_SPINS(g),S_FLIGHT
- Try
- R(H);CHECK,XS(g)
- Vars
- K(f);N_SPINB(c),S_FLIGHT::QAB1(B)
- Refutation
- K(f);P-FLIGHT,XR(H)
- Try
- Q(B);CHECK,N_PINB(c)
- Vars
- P(e);OGATEB,P_SPINP(e)::QAR2(B)
- Refutation
- B(c);P_SPINB(c)
- Try
- Q(B);N_PINB(c)
- Threat
- S(G)
- Refutation
- B(c);
- Try
- Q(B);N_PINB(c)
- Threat
- QAB1(B)
- Refutation
- K(f);N_SPINS(g),S_FLIGHT
- Try
- P(E);
- Vars
- K(f);N_SPINB(c),N_SPINS(g),S_FLIGHT::QAB1(B)
- P(d);N_GUARD::QAR2(B),XB(c)
- S(a);N_GUARD::S(C)
- S(a);N_GUARD,N_SPINB(c)::S(C)
- S(a);N_GUARD::S(C),XS(a)
- Refutation
- P(e);
- Try
- Actual
- Q(B);
- Vars
- K(f);N_SPINB(c),N_SPINS(g),S_FLIGHT::B(D)
- S(a);N_GUARD,N_SPINB(c),XQ(B)::S(C)
- P(d);N_GUARD::QAR2(B),XB(c)
- P(e);OGATEB,SBLOCK::QAR(B)
- 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).