MESON Chess Problem Database

Problem Display
PID: 268383 (5n1q/2R4Q/K3p1n1/4N3/1P1kP3/pp4P1/bN3PB1/B6r w - - 0 1)

Thomson, Robert Gavin

Prize, Sunday Referee, 1929

(First published on Sun May 12 1929)

5n1q/2R4Q/K3p1n1/4N3/1P1kP3/pp4P1/bN3PB1/B6r

#2

11 + 9

15239 Valois Notebooks 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe5
      • 2.Sc4#
    • 1...Qxe5
      • 2.Rc4#
    • 1...Sf4
      • 2.Sf3#
    • 1...Se7
      • 2.Sf3#
    • 1...axb2
      • 2.Bxb2#
  • Tries
    • 1.Sbd3+?
      • 1...Rxa1
        • 2.Rc4#
      • 1...b2!
    • 1.Rc1?
      • threat
        • 2.Sc6#
      • 1...Kxe5
        • 2.Sc4#
      • 1...Qxe5
        • 2.Rc4#
      • 1...Sxe5
        • 2.Qa7#
      • 1...axb2
        • 2.Bxb2#
      • 1...Se7
        • 2.Sf3#
      • 1...Rxc1!
    • 1.Rc5?
      • threat
        • 2.Sc6#
      • 1...Qxe5
        • 2.Rc4#
      • 1...axb2
        • 2.Bxb2#
      • 1...Se7
        • 2.Sf3#
      • 1...Sxe5!
    • 1.Qd7+?
      • 1...Kxe5
        • 2.Sd3#
        • 2.Sc4#
      • 1...Sxd7!
    • 1.Qe7?
      • threat
        • 2.Qc5#
        • 2.Qd6#
      • 1...Kxe5
        • 2.Sd3#
        • 2.Sc4#
      • 1...Qxe5
        • 2.Rc4#
      • 1...Rc1
        • 2.Qd6#
      • 1...Sf4
        • 2.Qc5#
      • 1...Sd7
        • 2.Qd6#
      • 1...Sxe7!
    • 1.Qg7?
      • threat
        • 2.Sc6#
        • 2.Rc4#
      • 1...Sxe5
        • 2.Rc4#
      • 1...axb2
        • 2.Bxb2#
        • 2.Rc4#
      • 1...Rc1
        • 2.Sc6#
      • 1...Qxg7!
  • Keys
    • 1.Rc2!
      • threat
        • 2.Sc6#
      • 1...Kxe5
        • 2.Sc4#
      • 1...Qxe5
        • 2.Rc4#
      • 1...Sxe5
        • 2.Qa7#
      • 1...axb2
        • 2.Bxb2#
      • 1...bxc2
        • 2.Sd1#
      • 1...Se7
        • 2.Sf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • K(e);S_FLIGHT,XS(H)::B(A)+S(B),DCHECK
    • Q(i);SBLOCK,XS(H)::R1(J)
    • S(g);::S(H)
    • P(c);OGATE,P_SPINP(c),XS(B)::B(A),XP(c)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • R(a);XB(A)::R1(J)
      • Refutation
        • P(d);P_SPINP(d)
    • Try
      • R(J);
      • Threat
        • S(H)
      • Vars
        • K(e);S_FLIGHT,XS(H)::B(A)+S(B),DCHECK
        • Q(i);SBLOCK,XS(H)::R1(J)
        • S(g);SBLOCK,XS(H)::QAB(K)
        • P(c);OGATE,P_SPINP(c),XS(B)::B(A),XP(c)
        • S(g);::S(H)
      • Refutation
        • R(a);XR(J)
    • Try
      • R(J);
      • Threat
        • S(H)
      • Vars
        • Q(i);SBLOCK,XS(H)::R1(J)
        • P(c);OGATE,P_SPINP(c),XS(B)::B(A),XP(c)
        • S(g);::S(H)
      • Refutation
        • S(g);XS(H)
    • Try
      • Q(K);CHECK
      • Refutation
        • S(h);XQ(K)
    • Try
      • Q(K);
      • Threat
        • DUALS(2)
      • Vars
        • Q(i);SBLOCK,XS(H)::R1(J)
        • R(a);::QAR2(K)
        • S(g);::QAB1(K)
        • S(h);::QAR2(K)
      • Refutation
        • S(g);XQ(K)
    • Try
      • Q(K);
      • Threat
        • DUALS(2)
      • Vars
        • S(g);P_SPINS(g),XS(H)::R1(J)
        • R(a);::QAB(K)+S(H),DCHECK
      • Refutation
        • Q(i);XQ(K)
  • Actual
    • R(J);
    • Threat
      • S(H)
    • Vars
      • K(e);S_FLIGHT,XS(H)::B(A)+S(B),DCHECK
      • Q(i);SBLOCK,XS(H)::R1(J)
      • S(g);SBLOCK,XS(H)::QAB(K)
      • P(c);OGATE,P_SPINP(c),XS(B)::B(A),XP(c)
      • P(d);N_GUARD,XR(J)::B(A)+S(B)
      • S(g);::S(H)
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