MESON Chess Problem Database
Problem Display
PID: 96799 (2NN1Q1n/3r1p1r/3p1k2/8/3KPBR1/6P1/8/8 w - - 0 1)
Watson, Charles Gilbert Marriott
The Chess Problem, 1947
#2
8 + 6
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Ra7
- 2.Qxd6#
- 1...Rb7
- 2.Qxd6#
- 1...Rc7
- 2.Qxd6#
- 1...Re7
- 2.Qxe7#
- 1...Rxd8
- 2.Qe7#
- 1...Rh1
- 2.Qg7#
- 1...Rh2
- 2.Qg7#
- 1...Rh3
- 2.Qg7#
- 1...Rh4
- 2.Qg7#
- 1...Rh5
- 2.Qg7#
- 1...Rh6
- 2.Qg7#
- 1...Rg7
- 2.Qxg7#
- 1...Sg6
- 2.Bg5#
- 1...d5
- 2.Be5#
- 1...Ra7
- Tries
- 1.Kd5?
- 1...Rxd8
- 2.Qe7#
- 2.Qxd8#
- 1...Sg6
- 2.Bg5#
- 1...Ra7
- 2.Qxd6#
- 1...Rb7
- 2.Qxd6#
- 1...Rc7
- 2.Qxd6#
- 1...Re7
- 2.Qxe7#
- 1...Rh1
- 2.Qg7#
- 1...Rh2
- 2.Qg7#
- 1...Rh3
- 2.Qg7#
- 1...Rh4
- 2.Qg7#
- 1...Rh6
- 2.Qg7#
- 1...Rg7
- 2.Qxg7#
- 1...Rh5+!
- 1...Rxd8
- 1.Sb6?
- threat
- 2.Sd5#
- 2.Sxd7#
- 1...Ra7
- 2.Sd5#
- 2.Qxd6#
- 1...Rb7
- 2.Sd5#
- 2.Qxd6#
- 1...Rc7
- 2.Sd5#
- 2.Qxd6#
- 1...Re7
- 2.Sd5#
- 1...Rh5
- 2.Sxd7#
- 1...d5
- 2.Sxd7#
- 2.Be5#
- 1...Rxd8!
- threat
- 1.Bc1?
- 1...Rxd8
- 2.Qe7#
- 1...Sg6
- 2.Bg5#
- 1...Ra7
- 2.Qxd6#
- 1...Rb7
- 2.Qxd6#
- 1...Rc7
- 2.Qxd6#
- 1...Re7
- 2.Qxe7#
- 1...Rh1
- 2.Qg7#
- 1...Rh2
- 2.Qg7#
- 1...Rh3
- 2.Qg7#
- 1...Rh4
- 2.Qg7#
- 1...Rh5
- 2.Qg7#
- 1...Rh6
- 2.Qg7#
- 1...Rg7
- 2.Qxg7#
- 1...d5!
- 1...Rxd8
- 1.Bd2?
- 1...Rxd8
- 2.Qe7#
- 1...Sg6
- 2.Bg5#
- 1...Ra7
- 2.Qxd6#
- 1...Rb7
- 2.Qxd6#
- 1...Rc7
- 2.Qxd6#
- 1...Re7
- 2.Qxe7#
- 1...Rh1
- 2.Qg7#
- 1...Rh2
- 2.Qg7#
- 1...Rh3
- 2.Qg7#
- 1...Rh4
- 2.Qg7#
- 1...Rh5
- 2.Qg7#
- 1...Rh6
- 2.Qg7#
- 1...Rg7
- 2.Qxg7#
- 1...d5!
- 1...Rxd8
- 1.Be3?
- 1...Rxd8
- 2.Qe7#
- 1...Sg6
- 2.Bg5#
- 1...Ra7
- 2.Qxd6#
- 1...Rb7
- 2.Qxd6#
- 1...Rc7
- 2.Qxd6#
- 1...Re7
- 2.Qxe7#
- 1...Rh1
- 2.Qg7#
- 1...Rh2
- 2.Qg7#
- 1...Rh3
- 2.Qg7#
- 1...Rh4
- 2.Qg7#
- 1...Rh5
- 2.Qg7#
- 1...Rh6
- 2.Qg7#
- 1...Rg7
- 2.Qxg7#
- 1...d5!
- 1...Rxd8
- 1.Bxd6?
- 1...Rxd6+
- 2.Qxd6#
- 1...Rxd8
- 2.Qe7#
- 1...Ra7
- 2.Be5#
- 1...Rb7
- 2.Be5#
- 1...Rc7
- 2.Be5#
- 1...Re7
- 2.Bxe7#
- 2.Qxe7#
- 1...Rh1
- 2.Qg7#
- 1...Rh2
- 2.Qg7#
- 1...Rh3
- 2.Qg7#
- 1...Rh4
- 2.Qg7#
- 1...Rh5
- 2.Qg7#
- 1...Rh6
- 2.Qg7#
- 1...Rg7
- 2.Qxg7#
- 1...Sg6!
- 1...Rxd6+
- 1.Bh6?
- 1...Rxd8
- 2.Qe7#
- 1...Rxh6
- 2.Qg7#
- 1...Sg6
- 2.Bg5#
- 1...Ra7
- 2.Qxd6#
- 1...Rb7
- 2.Qxd6#
- 1...Rc7
- 2.Qxd6#
- 1...Re7
- 2.Qxe7#
- 1...Rg7
- 2.Bxg7#
- 2.Qxg7#
- 1...d5!
- 1...Rxd8
- 1.Rg8?
- threat
- 2.Bg5#
- 1...Rxd8
- 2.Qe7#
- 1...Rg7
- 2.Qxg7#
- 1...Rh5
- 2.Qg7#
- 1...Sg6!
- threat
- 1.Qh6+?
- 1...Sg6
- 2.Bg5#
- 1...Rxh6!
- 1...Sg6
- 1.Qg8?
- threat
- 2.Bg5#
- 2.Qg5#
- 1...Sg6
- 2.Bg5#
- 1...Rh5
- 2.Qg7#
- 1...Rg7
- 2.Qxg7#
- 1...Rxd8!
- threat
- 1.Qxh8+?
- 1...Rg7
- 2.Qxg7#
- 1...Rxh8!
- 1...Rg7
- 1.e5+?
- 1...Kf5
- 2.Rg5#
- 1...dxe5+!
- 1...Kf5
- 1.Kd5?
- Keys
- 1.Rg5!
- 1...Rxd8
- 2.Qe7#
- 1...Sg6
- 2.Rf5#
- 1...Ra7
- 2.Qxd6#
- 1...Rb7
- 2.Qxd6#
- 1...Rc7
- 2.Qxd6#
- 1...Re7
- 2.Qxe7#
- 1...Rh1
- 2.Qg7#
- 1...Rh2
- 2.Qg7#
- 1...Rh3
- 2.Qg7#
- 1...Rh4
- 2.Qg7#
- 1...Rh5
- 2.Qg7#
- 1...Rh6
- 2.Qg7#
- 1...Rg7
- 2.Qxg7#
- 1...d5
- 2.e5#
- 1...Rxd8
- 1.Rg5!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 2
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- R(c);N_GUARD::QAR2(H),XP(a)
- R(c);N_GUARD::QAB1(H),XR(c)
- R(c);N_GUARD,XS(G)::QAB1(H)
- R(e);N_GUARD::QAB1(H)
- R(e);N_GUARD::QAB1(H),XR(e)
- S(f);SBLOCK::B(D)
- P(a);N_GUARD::B(D)
- Tries
- Try
- K(B);P-FLIGHT
- Vars
- S(f);SBLOCK::B(D)
- R(c);N_GUARD::QAR2(H),XP(a)
- R(c);N_GUARD::QAB1(H),XR(c)
- R(e);N_GUARD::QAB1(H)
- R(e);N_GUARD::QAB1(H),XR(e)
- Refutation
- R(e);CHECK
- Try
- S(F);
- Threat
- DUALS(2)
- Vars
- R(c);::S(F)
- R(e);::S(F),XR(c)
- Refutation
- R(c);XS(G)
- Try
- B(D);
- Vars
- R(c);N_GUARD,XS(G)::QAB1(H)
- S(f);SBLOCK::B(D)
- R(c);N_GUARD::QAR2(H),XP(a)
- R(c);N_GUARD::QAB1(H),XR(c)
- R(e);N_GUARD::QAB1(H)
- R(e);N_GUARD::QAB1(H),XR(e)
- Refutation
- P(a);
- Try
- B(D);
- Vars
- R(c);N_GUARD,XS(G)::QAB1(H)
- S(f);SBLOCK::B(D)
- R(c);N_GUARD::QAR2(H),XP(a)
- R(c);N_GUARD::QAB1(H),XR(c)
- R(e);N_GUARD::QAB1(H)
- R(e);N_GUARD::QAB1(H),XR(e)
- Refutation
- P(a);
- Try
- B(D);
- Vars
- R(c);N_GUARD,XS(G)::QAB1(H)
- S(f);SBLOCK::B(D)
- R(c);N_GUARD::QAR2(H),XP(a)
- R(c);N_GUARD::QAB1(H),XR(c)
- R(e);N_GUARD::QAB1(H)
- R(e);N_GUARD::QAB1(H),XR(e)
- Refutation
- P(a);
- Try
- B(D);P_SPINB(D),XP(a)
- Vars
- R(c);CHECK,OGATE,XB(D)::QAR2(H),XR(c)
- R(c);N_GUARD,XS(G)::QAB1(H)
- R(c);N_PINB(D)::B(D)
- R(e);N_GUARD::QAB1(H)
- R(e);N_GUARD::QAB1(H),XR(e)
- Refutation
- S(f);
- Try
- B(D);
- Vars
- R(c);N_GUARD,XS(G)::QAB1(H)
- R(e);N_GUARD,XB(D)::QAB1(H)
- S(f);SBLOCK::B(D)
- R(c);N_GUARD::QAR2(H),XP(a)
- R(c);N_GUARD::QAB1(H),XR(c)
- Refutation
- P(a);
- Try
- R(E);
- Threat
- B(D)
- Vars
- R(c);N_GUARD,XS(G)::QAB1(H)
- R(e);N_GUARD::QAB1(H),XR(e)
- R(e);N_GUARD::QAB1(H)
- Refutation
- S(f);
- Try
- Q(H);CHECK,N_PINP(d)
- Vars
- S(f);P_SPINS(f)::B(D)
- Refutation
- R(e);XQ(H)
- Try
- Q(H);N_PINP(d)
- Threat
- DUALS(2)
- Vars
- S(f);::B(D)
- R(e);N_GUARD::QAB1(H)
- R(e);N_GUARD::QAB1(H),XR(e)
- Refutation
- R(c);XS(G)
- Try
- Q(H);CHECK,N_PINP(d),XS(f)
- Vars
- R(e);N_GUARD,P_SPINR(e)::QAB1(H),XR(e)
- Refutation
- R(e);XQ(H)
- Try
- P(C);CHECK
- Vars
- K(b);P-FLIGHT::R1(E)
- Refutation
- P(a);CHECK,XP(C)
- Try
- Actual
- R(E);
- Vars
- R(c);N_GUARD,XS(G)::QAB1(H)
- S(f);SBLOCK::R1(E)
- R(c);N_GUARD::QAR2(H),XP(a)
- R(c);N_GUARD::QAB1(H),XR(c)
- R(e);N_GUARD::QAB1(H)
- R(e);N_GUARD::QAB1(H),XR(e)
- P(a);N_GUARD::P(C)
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).