MESON Chess Problem Database

Problem Display
PID: 18964 (1Q4K1/8/3P1B2/5kPp/3RN2p/4P1nr/5pRp/5B1n w - - 0 1)

Quack, Godfrey C

The Tablet, 1963

(First published on Sat Nov 9 1963)

1Q4K1/8/3P1B2/5kPp/3RN2p/4P1nr/5pRp/5B1n

#2

10 + 8

15239 Valois Notebooks 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Ke6
      • 2.Qc8#
  • Tries
    • 1.Kg7?
      • threat
        • 2.Qc8#
      • 1...Ke6
        • 2.Qc8#
      • 1...Kg4!
    • 1.Rxf2+?
      • 1...Kg4
        • 2.Rf4#
      • 1...Ke6
        • 2.Sc5#
        • 2.Qc8#
        • 2.Qe8#
      • 1...Kg6
        • 2.Qe8#
      • 1...Sxf2!
    • 1.Qb5+?
      • 1...Kg4
        • 2.Sd2#
        • 2.Be2#
      • 1...Ke6
        • 2.Bc4#
      • 1...Kg6!
    • 1.Qe8?
      • 1...Sxf1
        • 2.Rd5#
      • 1...Sxe4
        • 2.Rd5#
        • 2.Qxe4#
      • 1...Se2
        • 2.Rd5#
      • 1...Kg4!
  • Keys
    • 1.Qb1!
      • 1...Kg4
        • 2.Sd2#
      • 1...Ke6
        • 2.Sc5#
      • 1...Kg6
        • 2.Sxg3#
      • 1...Sxf1
        • 2.Sc5#
      • 1...Sxe4
        • 2.Qxe4#
      • 1...Se2
        • 2.Sc5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • K(g);S_FLIGHT::QAB(I)
  • Tries
    • Try
      • K(J);P-FLIGHT
      • Threat
        • QAB(I)
      • Vars
        • K(g);S_FLIGHT::QAB(I)
      • Refutation
        • K(g);P_SPINS(d),S_FLIGHT
    • Try
      • R(B);CHECK,XP(b)
      • Vars
        • K(g);S_FLIGHT::R1(B)
        • K(g);S_FLIGHT::QAB(I)
      • Refutation
        • S(a);XR(B)
    • Try
      • Q(I);CHECK
      • Vars
        • K(g);S_FLIGHT::B(A)
      • Refutation
        • K(g);S_FLIGHT
    • Try
      • Q(I);
      • Vars
        • S(d);XB(A)::R(D)
        • S(d);::R(D)
      • Refutation
        • K(g);P_SPINS(d),S_FLIGHT
  • Actual
    • Q(I);
    • Vars
      • K(g);P_SPINS(d),S_FLIGHT::R(D)+S(E)
      • K(g);S_FLIGHT::S(E)
      • K(g);S_FLIGHT::QAB(I)+S(E),XS(d)
      • S(d);N_GUARD,XB(A)::QAB(I)+S(E)
      • S(d);OGATE,P_SPINS(d),XS(E)::QAB1(I),XS(d)
      • S(d);N_GUARD::QAB(I)+S(E)
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