MESON Chess Problem Database
Problem Display
PID: 132826 (8/8/8/3K1prB/3P1k2/3QN1pb/3Pp1p1/3N4 w - - 0 1)
Brown, David Leo
The Problemist, 1978
#2
7 + 7
SOLUTION
- SOUND
- Sets
- 1...Rg4
- 2.Qxf5#
- 1...Bg4
- 2.Sxg2#
- 1...Rg4
- Tries
- 1.Sc2?
- threat
- 2.Qe3#
- 2.Qf3#
- 1...exd1Q
- 2.Qe3#
- 1...exd1S
- 2.Qf3#
- 1...exd1B
- 2.Qe3#
- 1...Rg4
- 2.Qe3#
- 1...Rg6
- 2.Qe3#
- 1...Rg7
- 2.Qe3#
- 1...Rg8
- 2.Qe3#
- 1...e1Q
- 2.Qf3#
- 1...e1S
- 2.Qe3#
- 1...e1R
- 2.Qf3#
- 1...g1Q
- 2.Qf3#
- 1...g1S
- 2.Qe3#
- 1...g1B
- 2.Qf3#
- 1...Bg4
- 2.Qe3#
- 1...Rxh5!
- threat
- 1.Sc4?
- threat
- 2.Qe3#
- 2.Qf3#
- 1...exd1Q
- 2.Qe3#
- 1...exd1S
- 2.Qf3#
- 1...exd1B
- 2.Qe3#
- 1...Rg4
- 2.Qe3#
- 1...Rg6
- 2.Qe3#
- 1...Rg7
- 2.Qe3#
- 1...Rg8
- 2.Qe3#
- 1...e1Q
- 2.Qf3#
- 1...e1S
- 2.Qe3#
- 1...e1R
- 2.Qf3#
- 1...g1Q
- 2.Qf3#
- 1...g1S
- 2.Qe3#
- 1...g1B
- 2.Qf3#
- 1...Bg4
- 2.Qe3#
- 1...Rxh5!
- threat
- 1.Qxf5+?
- 1...Bxf5
- 2.Sxg2#
- 1...Rxf5+!
- 1...Bxf5
- 1.Sc2?
- Keys
- 1.Sf1!
- threat
- 2.Qe3#
- 2.Qf3#
- 1...Rxh5
- 2.Qxg3#
- 1...exd1Q
- 2.Qe3#
- 1...exd1S
- 2.Qf3#
- 1...exd1B
- 2.Qe3#
- 1...exf1Q
- 2.Qe3#
- 1...exf1S
- 2.Qf3#
- 1...exf1R
- 2.Qe3#
- 1...gxf1Q
- 2.Qe3#
- 1...gxf1S
- 2.Qf3#
- 1...gxf1R
- 2.Qe3#
- 1...Rg4
- 2.Qe3#
- 1...Rg6
- 2.Qe3#
- 1...Rg7
- 2.Qe3#
- 1...Rg8
- 2.Qe3#
- 1...e1Q
- 2.Qf3#
- 1...e1S
- 2.Qe3#
- 1...e1R
- 2.Qf3#
- 1...g1Q
- 2.Qf3#
- 1...g1S
- 2.Qe3#
- 1...g1B
- 2.Qf3#
- 1...Bg4
- 2.Qe3#
- 2.Qxg3#
- threat
- 1.Sf1!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 19
- REMOVED MATES = 1
- Sets
- R(g);N_GUARD,S_CUTB(d)::QAR1(C),XP(f)
- B(d);N_GUARD::S(D),XP(b)
- Tries
- Try
- S(D);
- Threat
- DUALS(2)
- Vars
- P(a);XS(A)::QAB1(C)
- P(a);XS(A)::QAR1(C)
- R(g);::QAB1(C)
- P(a);::QAR1(C)
- P(a);::QAB1(C)
- P(b);::QAR1(C)
- P(b);::QAB1(C)
- B(d);::QAB1(C)
- Refutation
- R(g);XB(G)
- Try
- S(D);
- Threat
- DUALS(2)
- Vars
- P(a);XS(A)::QAB1(C)
- P(a);XS(A)::QAR1(C)
- R(g);::QAB1(C)
- P(a);::QAR1(C)
- P(a);::QAB1(C)
- P(b);::QAR1(C)
- P(b);::QAB1(C)
- B(d);::QAB1(C)
- Refutation
- R(g);XB(G)
- Try
- Q(C);CHECK,P_SPINQ(C),XP(f)
- Vars
- B(d);SBLOCK,XQ(C)::S(D),XP(b)
- Refutation
- R(g);CHECK,XQ(C)
- Try
- Actual
- S(D);
- Threat
- DUALS(2)
- Vars
- R(g);N_GUARD,XB(G)::QAB1(C),XP(c)
- P(a);XS(A)::QAB1(C)
- P(a);XS(A)::QAR1(C)
- P(a);XS(D)::QAB1(C)
- P(a);XS(D)::QAR1(C)
- P(b);XS(D)::QAB1(C)
- P(b);XS(D)::QAR1(C)
- R(g);::QAB1(C)
- P(a);::QAR1(C)
- P(a);::QAB1(C)
- P(b);::QAR1(C)
- P(b);::QAB1(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).