MESON Chess Problem Database

Problem Display
PID: 204245 (3r4/3Q4/1p1N1pN1/1p3pp1/1P1k1nRb/5PB1/B3P3/nR1K4 w - - 0 1)

Driver, John Edward

Correspondence Chess, 1960

3r4/3Q4/1p1N1pN1/1p3pp1/1P1k1nRb/5PB1/B3P3/nR1K4

#2

11 + 10

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kc3
      • 2.Sxb5#
    • 1...Ke3
      • 2.Sxf5#
  • Tries
    • 1.Kd2?
      • threat
        • 2.Sxb5#
        • 2.Sxf5#
        • 2.e3#
      • 1...fxg4
        • 2.Sxb5#
        • 2.Sf5#
        • 2.e3#
      • 1...Re8
        • 2.Sc4#
        • 2.Sxb5#
        • 2.Sxf5#
        • 2.Sb7#
        • 2.Sf7#
        • 2.Sc8#
        • 2.Sxe8#
      • 1...Sc2
        • 2.Sxb5#
        • 2.Sxf5#
      • 1...Sb3+!
    • 1.Bf2+?
      • 1...Kc3
        • 2.Sxb5#
        • 2.Qc6#
        • 2.Qc7#
      • 1...Bxf2!
    • 1.Rc1?
      • threat
        • 2.Sxf5#
      • 1...Ke3
        • 2.Sxf5#
      • 1...fxg4
        • 2.Sf5#
      • 1...Sc2!
    • 1.Rxf4+?
      • 1...Kc3
        • 2.Sxb5#
        • 2.Qc6#
        • 2.Qc7#
      • 1...Ke3
        • 2.Sxf5#
        • 2.Qe6#
        • 2.Qe7#
      • 1...gxf4!
    • 1.Qxb5?
      • threat
        • 2.Qd3#
      • 1...Kc3
        • 2.Qc4#
      • 1...Ke3
        • 2.Qxb6#
      • 1...fxg4!
    • 1.Qc6?
      • threat
        • 2.Sxf5#
      • 1...Ke3
        • 2.Qxb6#
      • 1...fxg4
        • 2.Sf5#
      • 1...Rxd6!
    • 1.Qe6?
      • threat
        • 2.Sxb5#
      • 1...Kc3
        • 2.Qxf6#
      • 1...Rxd6!
  • Keys
    • 1.Qxf5!
      • threat
        • 2.Qd3#
      • 1...Kc3
        • 2.Qxf6#
      • 1...Ke3
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • K(b);N_SPINS(c),S_FLIGHT::S(I),XP(e)
    • K(b);N_SPINS(c),S_FLIGHT::S(I),XP(f)
  • Tries
    • Try
      • K(B);P-FLIGHT
      • Threat
        • DUALS(3)
      • Refutation
        • S(a);CHECK
    • Try
      • B(F);CHECK
      • Refutation
        • B(d);XB(F)
    • Try
      • R(A);
      • Threat
        • QAR(K)+S(I),DCHECK,XP(f)
      • Vars
        • K(b);N_SPINS(c),S_FLIGHT::S(I),XP(f)
        • P(f);N_SPINS(c),XR(H)::QAR(K)+S(I),DCHECK
      • Refutation
        • S(a);
    • Try
      • R(H);CHECK,XS(c)
      • Refutation
        • P(g);XR(H)
    • Try
      • Q(K);XP(e)
      • Threat
        • QAR1(K)
      • Vars
        • K(b);N_SPINS(c),P_PINS(I),S_FLIGHT::QAR1(K)
        • K(b);N_SPINS(c),P_PINS(I),S_FLIGHT::QAB(K),XP(h)
      • Refutation
        • P(f);N_SPINS(c),XR(H)
    • Try
      • Q(K);
      • Threat
        • S(I),XP(f)
      • Vars
        • K(b);N_SPINS(c),P_PINS(I),S_FLIGHT::QAB(K),XP(h)
        • P(f);N_SPINS(c),XR(H)::S(I)
      • Refutation
        • R(j);XS(I)
    • Try
      • Q(K);
      • Threat
        • S(I),XP(e)
      • Vars
        • K(b);N_SPINS(c),P_PINS(I),S_FLIGHT::QAB(K),XP(i)
      • Refutation
        • R(j);XS(I)
  • Actual
    • Q(K);XP(f)
    • Threat
      • QAR1(K)
    • Vars
      • K(b);N_SPINS(c),P_PINS(I),S_FLIGHT::QAB(K),XP(i)
      • K(b);N_SPINS(c),P_PINS(I),S_FLIGHT::QAR1(K)
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