MESON Chess Problem Database

Problem Display
PID: 54298 (8/6bK/8/8/4N3/n3R3/4R1N1/Qb3krn w - - 0 1)

Quah, James

The Problemist Supplement, 2004

8/6bK/8/8/4N3/n3R3/4R1N1/Qb3krn

#2

6 + 6

14772 Creative and Imaginative Chess Concepts 2007

SOLUTION

  • SOUND
  • Sets
    • 1...Rxg2
      • 2.Re1#
    • 1...Sf2
      • 2.Rxf2#
    • 1...Sg3
      • 2.Rf2#
    • 1...Sc2
      • 2.Sd2#
    • 1...Sc4
      • 2.Qxb1#
    • 1...Sb5
      • 2.Qxb1#
  • Tries
    • 1.Kxg7?
      • threat
        • 2.Sd2#
      • 1...Sf2
        • 2.Rxf2#
      • 1...Sc4
        • 2.Qxb1#
      • 1...Rxg2+!
    • 1.Kg8?
      • threat
        • 2.Sd2#
      • 1...Rxg2
        • 2.Re1#
      • 1...Sf2
        • 2.Rxf2#
      • 1...Sc4
        • 2.Qxb1#
      • 1...Bc3!
    • 1.Sf4?
      • threat
        • 2.Re1#
      • 1...Sc2
        • 2.Sd2#
      • 1...Bc3!
    • 1.Sh4?
      • threat
        • 2.Re1#
      • 1...Sc2
        • 2.Sd2#
      • 1...Bc3!
    • 1.Rf3+?
      • 1...Sf2
        • 2.Rexf2#
        • 2.Rfxf2#
      • 1...Kxe2!
    • 1.Qf6+?
      • 1...Sf2
        • 2.Rxf2#
        • 2.Qxf2#
      • 1...Bxf6!
    • 1.Qxg7?
      • threat
        • 2.Re1#
      • 1...Sg3
        • 2.Rf2#
      • 1...Sc2
        • 2.Sd2#
      • 1...Bxe4+!
  • Keys
    • 1.Rd2!
      • threat
        • 2.Re1#
      • 1...Rxg2
        • 2.Rd1#
      • 1...Sf2
        • 2.Rxf2#
      • 1...Sc2
        • 2.Qa6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 3
  • Sets
    • R(c);SBLOCK,XS(C)::R1(B)
    • S(d);N_GUARD::R1(B),XS(d)
    • S(d);N_GUARD::R1(B)
    • S(e);N_PINS(E)::S(E)
    • S(e);N_GUARD::QAR(A),XB(a)
  • Tries
    • Try
      • K(F);N_SPINS(E),P-FLIGHT,P_SPINS(C),XB(f)
      • Threat
        • S(E)
      • Vars
        • S(d);N_GUARD::R1(B),XS(d)
        • S(e);N_GUARD::QAR(A),XB(a)
      • Refutation
        • R(c);CHECK,XS(C)
    • Try
      • K(F);N_SPINS(E),S_FLIGHT
      • Threat
        • S(E)
      • Vars
        • R(c);SBLOCK,XS(C)::R1(B)
        • S(d);N_GUARD::R1(B),XS(d)
        • S(e);N_GUARD::QAR(A),XB(a)
      • Refutation
        • B(f);P_PINS(C)
    • Try
      • S(C);
      • Threat
        • R1(B)
      • Vars
        • S(e);N_PINS(E)::S(E)
      • Refutation
        • B(f);
    • Try
      • S(C);
      • Threat
        • R1(B)
      • Vars
        • S(e);N_PINS(E)::S(E)
      • Refutation
        • B(f);
    • Try
      • R(D);CHECK
      • Refutation
        • K(b);N_SPINB(a),S_FLIGHT,XR(B)
    • Try
      • Q(A);CHECK,N_PINB(a)
      • Refutation
        • B(f);XQ(A)
    • Try
      • Q(A);N_PINB(a),XB(f)
      • Threat
        • R1(B)
      • Vars
        • S(d);N_GUARD::R1(B)
        • S(e);N_PINS(E)::S(E)
      • Refutation
        • B(a);CHECK,XS(E)
  • Actual
    • R(B);
    • Threat
      • R1(D)
    • Vars
      • R(c);SBLOCK,XS(C)::R(B)
      • S(d);N_GUARD::R1(B),XS(d)
      • S(e);N_PINS(E),OGATE::QAB(A)
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