MESON Chess Problem Database
Problem Display
PID: 9724 (4B3/1p6/1BN5/1K2P1Q1/R7/1p3k1q/6Nb/4R1n1 w - - 0 1)
Blake, Percy Francis
5th Prize, Western Daily Mercury, 1908
#2
9 + 6
SOLUTION
- SOUND
- Sets
- 1...Qxg2
- 2.Qe3#
- 1...Qg4
- 2.Qxg4#
- 1...Qf5
- 2.Sh4#
- 1...Qe6
- 2.Sh4#
- 1...Qd7
- 2.Sh4#
- 1...Qc8
- 2.Sh4#
- 1...Qh4
- 2.Sxh4#
- 1...Qh5
- 2.Bxh5#
- 1...Qh6
- 2.Qg4#
- 1...Qh7
- 2.Qg4#
- 1...Qh8
- 2.Qg4#
- 1...Bf4
- 2.Rxf4#
- 1...Bxe5
- 2.Sxe5#
- 1...Se2
- 2.Rf1#
- 1...b2
- 2.Ra3#
- 1...bxc6+
- 2.Bxc6#
- 1...Qxg2
- Tries
- 1.Bh5+?
- 1...Qg4
- 2.Qxg4#
- 1...Qxh5!
- 1...Qg4
- 1.Bg6?
- threat
- 2.Be4#
- 1...Qg4
- 2.Qxg4#
- 1...Qf5
- 2.Sh4#
- 1...Qh4
- 2.Sxh4#
- 1...Qh7
- 2.Qg4#
- 1...bxc6+!
- threat
- 1.Bf7?
- threat
- 2.Bd5#
- 1...Qg4
- 2.Qxg4#
- 1...Qf5
- 2.Sh4#
- 1...Qe6
- 2.Sh4#
- 1...Qd7
- 2.Sh4#
- 1...Qh4
- 2.Sxh4#
- 1...Qh7
- 2.Qg4#
- 1...bxc6+!
- threat
- 1.Qg6?
- 1...bxc6+
- 2.Bxc6#
- 1...Qxg2
- 2.Qd3#
- 1...Bxe5
- 2.Sxe5#
- 1...Qg4
- 2.Qxg4#
- 1...Qg3
- 2.Qe4#
- 1...Bg3
- 2.Qe4#
- 1...Qf5
- 2.Sh4#
- 1...Qe6
- 2.Sh4#
- 1...Qd7
- 2.Sh4#
- 1...Qc8
- 2.Sh4#
- 1...Qh4
- 2.Sxh4#
- 1...Qh6
- 2.Qg4#
- 1...Qh7
- 2.Qg4#
- 1...Qh8
- 2.Qg4#
- 1...Bf4
- 2.Rxf4#
- 1...Se2
- 2.Rf1#
- 1...b2
- 2.Ra3#
- 1...Qh5!
- 1...bxc6+
- 1.Bh5+?
- Keys
- 1.Qg8!
- 1...bxc6+
- 2.Bxc6#
- 1...Qxg2
- 2.Qxb3#
- 1...Bxe5
- 2.Sxe5#
- 1...Qg4
- 2.Qxg4#
- 1...Qg3
- 2.Qd5#
- 1...Bg3
- 2.Qd5#
- 1...Qf5
- 2.Sh4#
- 1...Qe6
- 2.Sh4#
- 1...Qd7
- 2.Sh4#
- 1...Qc8
- 2.Sh4#
- 1...Qh4
- 2.Sxh4#
- 1...Qh5
- 2.Bxh5#
- 1...Qh6
- 2.Qg4#
- 1...Qh7
- 2.Qg4#
- 1...Qh8
- 2.Qg4#
- 1...Bf4
- 2.Rxf4#
- 1...Se2
- 2.Rf1#
- 1...b2
- 2.Ra3#
- 1...bxc6+
- 1.Qg8!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 1
- ADDED MATES = 2
- REMOVED MATES = 0
- Sets
- Q(e);SBLOCK,XS(B)::QAR1(F)
- Q(e);N_GUARD::QAB1(F),XQ(e)
- Q(e);N_GUARD,P_PINP(E)::S(B)
- Q(e);N_GUARD::S(B)
- Q(e);N_GUARD,P_PINS(H)::S(B)
- Q(e);N_GUARD::S(B),XQ(e)
- Q(e);N_GUARD::B(I),XQ(e)
- Q(e);N_GUARD::QAB1(F)
- B(b);N_GUARD::R1(C),XB(b)
- B(b);XP(E)::S(H),XB(b)
- S(a);SBLOCK::R(A)
- P(c);OGATEB::R(C)
- P(f);CHECK,OGATE,XS(H)::B(I),XP(f)
- Tries
- Try
- B(I);CHECK
- Vars
- Q(e);N_GUARD,P_SPINQ(e)::QAB1(F),XQ(e)
- Refutation
- Q(e);XB(I)
- Try
- B(I);
- Threat
- B(I)
- Vars
- Q(e);N_GUARD::QAB1(F),XQ(e)
- Q(e);N_GUARD,P_PINP(E)::S(B)
- Q(e);N_GUARD::S(B),XQ(e)
- Q(e);N_GUARD::QAB1(F)
- Refutation
- P(f);CHECK,XS(H)
- Try
- B(I);
- Threat
- B(I)
- Vars
- Q(e);N_GUARD::QAB1(F),XQ(e)
- Q(e);N_GUARD,P_PINP(E)::S(B)
- Q(e);N_GUARD::S(B)
- Q(e);N_GUARD,P_PINS(H)::S(B)
- Q(e);N_GUARD::S(B),XQ(e)
- Q(e);N_GUARD::QAB1(F)
- Refutation
- P(f);CHECK,XS(H)
- Try
- Q(F);
- Vars
- P(f);CHECK,OGATE,XS(H)::B(I),XP(f)
- Q(e);SBLOCK,XS(B)::QAR2(F)
- B(b);XP(E)::S(H),XB(b)
- Q(e);N_GUARD::QAB1(F),XQ(e)
- Q(e);SBLOCK::QAB1(F)
- B(b);SBLOCK::QAB1(F)
- Q(e);N_GUARD,P_PINP(E)::S(B)
- Q(e);N_GUARD::S(B)
- Q(e);N_GUARD,P_PINS(H)::S(B)
- Q(e);N_GUARD::S(B),XQ(e)
- Q(e);N_GUARD::QAB1(F)
- B(b);N_GUARD::R1(C),XB(b)
- S(a);SBLOCK::R(A)
- P(c);OGATEB::R(C)
- Refutation
- Q(e);P_PINP(E)
- Try
- Actual
- Q(F);
- Vars
- P(f);CHECK,OGATE,XS(H)::B(I),XP(f)
- Q(e);SBLOCK,XS(B)::QAR(F),XP(c)
- B(b);XP(E)::S(H),XB(b)
- Q(e);N_GUARD::QAB1(F),XQ(e)
- Q(e);SBLOCK::QAB(F)
- B(b);SBLOCK::QAB(F)
- Q(e);N_GUARD,P_PINP(E)::S(B)
- Q(e);N_GUARD::S(B)
- Q(e);N_GUARD,P_PINS(H)::S(B)
- Q(e);N_GUARD::S(B),XQ(e)
- Q(e);N_GUARD,P_PINP(E)::B(I),XQ(e)
- Q(e);N_GUARD::QAB1(F)
- B(b);N_GUARD::R1(C),XB(b)
- S(a);SBLOCK::R(A)
- P(c);OGATEB::R(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).