MESON Chess Problem Database
Problem Display
PID: 215810 (4R3/1p3pb1/Q1nB4/4P1P1/2n1kNBR/4P3/b3PK2/q2N4 w - - 0 1)
Braithwaite, Kenneth Holmes
Probleemblad, 1980
#2
12 + 8
SOLUTION
- SOUND
- Sets
- 1...Qc3
- 2.Sxc3#
- 1...Qxe5
- 2.Sc3#
- 1...Qb1
- 2.Sc3#
- 1...Sb2
- 2.Sc3#
- 1...Sd2
- 2.Qd3#
- 1...Sa3
- 2.Qd3#
- 1...S4a5
- 2.Qd3#
- 1...S4xe5
- 2.Qd3#
- 1...Sb6
- 2.Qd3#
- 1...Sxd6
- 2.Qd3#
- 1...S6xe5
- 2.Qxb7#
- 1...b5
- 2.Qxc6#
- 1...f5
- 2.Bf3#
- 1...Qc3
- Tries
- 1.Sg2?
- threat
- 2.Be6#
- 1...Kd5
- 2.Bf3#
- 1...Qxe5
- 2.Sc3#
- 1...Sxe3
- 2.Qd3#
- 1...S4xe5
- 2.Qd3#
- 1...Sxd6
- 2.Qd3#
- 1...S6xe5
- 2.Qxb7#
- 1...f5
- 2.Bf3#
- 1...Bxe5!
- threat
- 1.Sh3?
- threat
- 2.Be6#
- 1...Kd5
- 2.Bf3#
- 1...Qxe5
- 2.Sc3#
- 1...Sxe3
- 2.Qd3#
- 1...S4xe5
- 2.Qd3#
- 1...Sxd6
- 2.Qd3#
- 1...S6xe5
- 2.Qxb7#
- 1...f5
- 2.Bf3#
- 1...Bxe5!
- threat
- 1.Sd5?
- threat
- 2.Be6#
- 1...Kxd5
- 2.Bf3#
- 1...Qxe5
- 2.S1c3#
- 2.S5c3#
- 1...Bxe5
- 2.Sf6#
- 1...Sxe3
- 2.Qd3#
- 1...S4xe5
- 2.Qd3#
- 1...Sxd6
- 2.Qd3#
- 1...f5
- 2.Bf3#
- 1...S6xe5!
- threat
- 1.Sg6?
- threat
- 2.Be6#
- 1...Kd5
- 2.Bf3#
- 1...Qxe5
- 2.Sc3#
- 1...Sxe3
- 2.Qd3#
- 1...S4xe5
- 2.Qd3#
- 1...S6xe5
- 2.Qxb7#
- 1...f5
- 2.Bf3#
- 1...Bxe5!
- threat
- 1.Qxc4+?
- 1...Qd4
- 2.Sc3#
- 1...Sd4
- 2.Qd3#
- 1...Bxc4!
- 1...Qd4
- 1.Sg2?
- Keys
- 1.Sh5!
- threat
- 2.Be6#
- 1...Kd5
- 2.Bf3#
- 1...Qxe5
- 2.Sc3#
- 1...Bxe5
- 2.Sf6#
- 1...Sxe3
- 2.Qd3#
- 1...S4xe5
- 2.Qd3#
- 1...Sxd6
- 2.Qd3#
- 1...S6xe5
- 2.Qxb7#
- 1...f5
- 2.Bf3#
- threat
- 1.Sh5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 8
- Sets
- Q(a);N_GUARD::S(A),XQ(a)
- Q(a);N_GUARD,P_SPINQ(a),XP(H)::S(A)
- Q(a);N_GUARD::S(A)
- S(c);S_CUTQ(a)::S(A)
- S(c);OGATE::QAB1(J)
- S(c);OGATE,P_SPINS(c),XP(H)::QAB1(J)
- S(c);OGATE,XB(K)::QAB1(J)
- S(e);OGATEB,P_SPINS(e),XP(H)::QAB(J),XP(f)
- P(f);N_GUARD::QAB(J),XS(e)
- P(g);SBLOCK::B(F)
- Tries
- Try
- S(E);
- Threat
- R(G)+B(F)
- Vars
- K(d);S_FLIGHT::B(F)
- Q(a);N_GUARD,P_SPINQ(a),XP(H)::S(A)
- S(c);OGATE,XP(D)::QAB1(J)
- S(c);OGATE,P_SPINS(c),XP(H)::QAB1(J)
- S(c);OGATE,XB(K)::QAB1(J)
- S(e);OGATEB,P_SPINS(e),XP(H)::QAB(J),XP(f)
- P(g);SBLOCK::R(G)+B(F),DCHECK
- Refutation
- B(h);P_SPINB(h),XP(H)
- Try
- S(E);
- Threat
- R(G)+B(F)
- Vars
- K(d);S_FLIGHT::B(F)
- Q(a);N_GUARD,P_SPINQ(a),XP(H)::S(A)
- S(c);OGATE,XP(D)::QAB1(J)
- S(c);OGATE,P_SPINS(c),XP(H)::QAB1(J)
- S(c);OGATE,XB(K)::QAB1(J)
- S(e);OGATEB,P_SPINS(e),XP(H)::QAB(J),XP(f)
- P(g);SBLOCK::R(G)+B(F),DCHECK
- Refutation
- B(h);P_SPINB(h),XP(H)
- Try
- S(E);
- Threat
- R(G)+B(F)
- Vars
- K(d);S_FLIGHT,XS(E)::B(F)
- B(h);N_GUARD,P_SPINB(h),XP(H)::S(E)
- S(c);OGATE,XP(D)::QAB1(J)
- S(c);OGATE,P_SPINS(c),XP(H)::QAB1(J)
- S(c);OGATE,XB(K)::QAB1(J)
- P(g);SBLOCK::R(G)+B(F),DCHECK
- Refutation
- S(e);P_SPINS(e),XP(H)
- Try
- S(E);
- Threat
- R(G)+B(F)
- Vars
- K(d);S_FLIGHT::B(F)
- Q(a);N_GUARD,P_SPINQ(a),XP(H)::S(A)
- S(c);OGATE,XP(D)::QAB1(J)
- S(c);OGATE,P_SPINS(c),XP(H)::QAB1(J)
- S(e);OGATEB,P_SPINS(e),XP(H)::QAB(J),XP(f)
- P(g);SBLOCK::R(G)+B(F),DCHECK
- Refutation
- B(h);P_SPINB(h),XP(H)
- Try
- Q(J);CHECK,XS(c)
- Vars
- Q(a);P_PINP(D),P_SPINQ(a)::S(A)
- S(e);P_SPINS(e)::QAB1(J)
- Refutation
- B(b);XQ(J)
- Try
- Actual
- S(E);
- Threat
- R(G)+B(F)
- Vars
- K(d);S_FLIGHT::B(F)
- Q(a);N_GUARD,P_SPINQ(a),XP(H)::S(A)
- B(h);N_GUARD,P_SPINB(h),XP(H)::S(E)
- S(c);OGATE,XP(D)::QAB1(J)
- S(c);OGATE,P_SPINS(c),XP(H)::QAB1(J)
- S(c);OGATE,XB(K)::QAB1(J)
- S(e);OGATEB,P_SPINS(e),XP(H)::QAB(J),XP(f)
- P(g);SBLOCK::R(G)+B(F),DCHECK
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).