MESON Chess Problem Database
Problem Display
PID: 21429 (7B/2pB1k1P/2Pb2Np/4P3/p2pPKR1/5Q2/5P2/7n w - - 0 1)
Challenger, Alfred Clement
3rd Prize, BCPJ (March), 1919
#2
11 + 7
SOLUTION
- SOUND
- Sets
- 1...Ba3
- 2.e6#
- 1...Bb4
- 2.e6#
- 1...Bc5
- 2.e6#
- 1...Bxe5+
- 2.Kxe5#
- 1...Be7
- 2.e6#
- 1...Bf8
- 2.e6#
- 1...Sxf2
- 2.Kg3#
- 1...Sg3
- 2.Kxg3#
- 1...a3
- 2.Qb3#
- 1...d3
- 2.Ke3#
- 1...h5
- 2.Kg5#
- 1...Ba3
- Tries
- 1.Kf5?
- threat
- 2.e6#
- 1...Bxe5
- 2.Kxe5#
- 1...Sg3+!
- threat
- 1.Rg5?
- threat
- 2.Kg4#
- 1...Bxe5+
- 2.Kxe5#
- 1...hxg5+
- 2.Kxg5#
- 1...Sxf2
- 2.Kg3#
- 1...Be7
- 2.e6#
- 1...Sg3
- 2.Kxg3#
- 1...h5!
- threat
- 1.Qe2?
- threat
- 2.Qc4#
- 2.Qa2#
- 1...d3
- 2.Qa2#
- 1...Bxe5+!
- threat
- 1.exd6?
- threat
- 2.Ke5#
- 1...Sg3
- 2.Kxg3#
- 1...cxd6!
- threat
- 1.Kf5?
- Keys
- 1.Qa3!
- threat
- 2.Qa2#
- 1...Bxe5+
- 2.Sxe5#
- 1...Bxa3
- 2.e6#
- threat
- 1.Qa3!
FEATURES
- Static
- TYPE = BLOCK_THREAT
- CHANGED MATES = 1
- ADDED MATES = 0
- REMOVED MATES = 9
- Sets
- B(d);N_PINP(F)::P(F)
- B(d);CHECK,XP(F)::QAR(B)+K(D),XB(d)
- S(a);XP(A)::QAR(B)+K(D)
- S(a);::QAR(B)+K(D),XS(a)
- P(b);N_GUARD::QAB(B)
- P(c);::QAR(B)+K(D)
- P(e);::QAR(B)+K(D)
- Tries
- Try
- K(D);N_SPINP(F),P-FLIGHT
- Threat
- P(F)
- Vars
- B(d);XP(F)::QAR(B)+K(D),XB(d)
- Refutation
- S(a);CHECK
- Try
- R(E);
- Threat
- QAR(B)+K(D)
- Vars
- B(d);CHECK,XP(F)::QAR(B)+K(D),XB(d)
- P(e);CHECK,XR(E)::QAR(B)+K(D),XP(e)
- S(a);XP(A)::QAR(B)+K(D)
- B(d);N_PINP(F)::P(F)
- S(a);::QAR(B)+K(D),XS(a)
- Refutation
- P(e);
- Try
- Q(B);
- Threat
- DUALS(2)
- Vars
- P(c);::QAB(B)
- Refutation
- B(d);CHECK,XP(F)
- Try
- P(F);N_SPINP(F),XB(d)
- Threat
- QAR(B)+K(D)
- Vars
- S(a);::QAR(B)+K(D),XS(a)
- Refutation
- P(f);XP(F)
- Try
- Actual
- Q(B);
- Threat
- QAB(B)
- Vars
- B(d);CHECK,XP(F)::S(H),XB(d)
- B(d);N_PINP(F),XQ(B)::P(F)
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).