MESON Chess Problem Database

Problem Display
PID: 2336 (8/8/8/6p1/3Q2R1/4KB2/6r1/6kb w - - 0 1)

Gardner, John Carey

Source?, 0000

8/8/8/6p1/3Q2R1/4KB2/6r1/6kb

#2

4 + 4

1679 American Chess Nuts 1868

SOLUTION

  • SOUND
  • Sets
    • 1...Kf1
      • 2.Qa1#
      • 2.Qd1#
  • Tries
    • 1.Rxg2+?
      • 1...Kf1
        • 2.Qa1#
        • 2.Qd1#
      • 1...Bxg2!
    • 1.Rh4?
      • threat
        • 2.Qa1#
        • 2.Qd1#
      • 1...Re2+
        • 2.Kxe2#
      • 1...Kf1
        • 2.Qa1#
        • 2.Qd1#
      • 1...Ra2
        • 2.Rxh1#
        • 2.Qd1#
      • 1...Rb2
        • 2.Rxh1#
        • 2.Qd1#
      • 1...Rc2
        • 2.Rxh1#
        • 2.Qd1#
      • 1...Rd2
        • 2.Rxh1#
      • 1...Rf2
        • 2.Rxh1#
      • 1...gxh4!
    • 1.Qb2?
      • 1...Kf1
        • 2.Qa1#
        • 2.Qc1#
        • 2.Qb1#
      • 1...Rxg4
        • 2.Qf2#
      • 1...Rg3
        • 2.Qf2#
      • 1...Kh2!
    • 1.Qd2?
      • 1...Kf1
        • 2.Qc1#
        • 2.Qd1#
      • 1...Rxg4
        • 2.Qf2#
      • 1...Rg3
        • 2.Qf2#
      • 1...Kh2!
  • Keys
    • 1.Qh8!
      • 1...Kf1
        • 2.Qa1#
      • 1...Rxg4
        • 2.Qxh1#
      • 1...Rg3
        • 2.Qxh1#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(D);CHECK,XR(c)
      • Refutation
        • B(b);XR(D)
    • Try
      • R(D);N_PINR(c)
      • Threat
        • DUALS(2)
      • Vars
        • R(c);CHECK::QAB(C)+K(A),XR(c)
        • R(c);::R1(D),XB(b)
      • Refutation
        • P(d);XR(D)
    • Try
      • Q(C);
      • Vars
        • R(c);N_SPINR(c),XR(D)::QAB1(C)
        • R(c);P_PINB(B)::QAB1(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(C);
      • Vars
        • R(c);N_SPINR(c),XR(D)::QAB1(C)
        • R(c);P_PINB(B)::QAB1(C)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(C);
    • Vars
      • K(a);N_SPINR(c),P-FLIGHT::QAR(C)
      • R(c);N_SPINR(c),XR(D)::QAR1(C),XB(b)
      • R(c);P_PINB(B)::QAR1(C),XB(b)
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