MESON Chess Problem Database
Problem Display
PID: 58351 (1N6/1pr1P1K1/Rnn1k2P/rQ3N2/2PP2BP/B3P1R1/8/q3b3 w - - 0 1)
Coombes, TA
Chess, 1943
#2
14 + 8
SOLUTION
- SOUND
- Sets
- 1...Qxd4+
- 2.Sxd4#
- 1...Rxe7+
- 2.Sxe7#
- 1...Bxg3
- 2.Sxg3#
- 1...Sd5
- 2.cxd5#
- 1...Sd7
- 2.e8Q#
- 2.e8R#
- 1...Sxd4
- 2.Sxd4#
- 1...Se5
- 2.d5#
- 1...Sxe7
- 2.Sxe7#
- 1...Qxd4+
- Tries
- 1.Qxc6+?
- 1...Rxc6
- 2.e8Q#
- 2.e8R#
- 1...bxc6!
- 1...Rxc6
- 1.Qxc6+?
- Keys
- 1.Bh3!
- threat
- 2.Rg6#
- 1...Qxd4+
- 2.Sxd4#
- 1...Rxe7+
- 2.Sxe7#
- 1...Bxg3
- 2.Sxg3#
- 1...Sxe7
- 2.Sxe7#
- 1...Sd5
- 2.cxd5#
- 1...Sd7
- 2.e8Q#
- 2.e8R#
- 1...Se5
- 2.d5#
- threat
- 1.Bh3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 1
- Sets
- Q(a);CHECK,P_PINP(L),XP(E)::B(F)+S(I),DCHECK,XQ(a)
- R(h);CHECK,XP(L)::B(F)+S(I),XR(h)
- B(b);XR(C)::B(F)+S(I),XB(b)
- S(d);OGATE,P_SPINS(e)::P(D),XS(d)
- S(d);OGATE,P_SPINS(e)::P=Q
- S(e);P_PINP(L),P_SPINS(d),XP(E)::B(F)+S(I),DCHECK,XS(e)
- S(e);N_PINP(E),P_PINP(L),P_SPINS(d),SBLOCK::P(E)
- S(e);P_SPINS(d),XP(L)::B(F)+S(I),XS(e)
- Tries
- Try
- Q(H);CHECK,XS(e)
- Vars
- R(h);OGATE,XQ(H)::P=Q
- Refutation
- P(g);XQ(H)
- Try
- Actual
- B(F);
- Threat
- R(C)
- Vars
- Q(a);CHECK,P_PINP(L),XP(E)::B(F)+S(I),DCHECK,XQ(a)
- R(h);CHECK,XP(L)::B(F)+S(I),XR(h)
- B(b);XR(C)::B(F)+S(I),XB(b)
- S(e);P_SPINS(d),XP(L)::B(F)+S(I),XS(e)
- S(d);OGATE,P_SPINS(e)::P(D),XS(d)
- S(d);OGATE,P_SPINS(e)::P=Q
- S(e);N_PINP(E),P_PINP(L),P_SPINS(d),SBLOCK::P(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).