MESON Chess Problem Database

Problem Display
PID: 5970 (6R1/8/3PKP2/2pp2Pp/Q3n1kp/7N/3prpP1/3B1Nn1 w - - 0 1)

Markwick, Frederick W

3rd Comm., BCPS 001. Ty., 1926

6R1/8/3PKP2/2pp2Pp/Q3n1kp/7N/3prpP1/3B1Nn1

#2

10 + 10

56 The Problemist 1927

SOLUTION

  • SOUND
  • Tries
    • 1.Kxd5?
      • threat
        • 2.Qd7#
        • 2.Qxe4#
      • 1...Kf5
        • 2.Qd7#
      • 1...Sf3
        • 2.Qd7#
      • 1...c4
        • 2.Qd7#
      • 1...Sxh3!
    • 1.Ke5?
      • threat
        • 2.Sxf2#
        • 2.Qd7#
      • 1...Sxh3
        • 2.Bxe2#
        • 2.Qd7#
      • 1...c4
        • 2.Qd7#
      • 1...d4
        • 2.Qd7#
      • 1...Sf3+!
    • 1.Bxe2+?
      • 1...Sf3
        • 2.Bxf3#
      • 1...Sxe2!
  • Keys
    • 1.Qd7!
      • threat
        • 2.Kxd5#
        • 2.Ke5#
        • 2.Ke7#
        • 2.Kf7#
      • 1...Sc3+
        • 2.Kf7#
      • 1...Sg3+
        • 2.Se3#
      • 1...Sxg5+
        • 2.Kxd5#
      • 1...Sxd6+
        • 2.Kxd6#
      • 1...Sxf6+
        • 2.Kxf6#
      • 1...Sxh3
        • 2.Ke5#
      • 1...Sf3
        • 2.Kxd5#
        • 2.Ke7#
        • 2.Kf7#
      • 1...d4
        • 2.Kd5#
        • 2.Ke5#
        • 2.Ke7#
        • 2.Kf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(H);S_FLIGHT,XP(i)
      • Threat
        • DUALS(2)
      • Vars
        • K(f);N_SPINR(c),N_SPINS(e),S_FLIGHT::QAB(E)
        • S(a);N_SPINR(c)::QAB(E)
        • P(h);N_SPINS(e)::QAB(E)
      • Refutation
        • S(a);XS(D)
    • Try
      • K(H);P-FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • P(h);N_SPINS(e)::QAB(E)
        • P(i);N_SPINS(e)::QAB(E)
      • Refutation
        • S(a);CHECK,N_SPINR(c)
    • Try
      • B(A);CHECK,XR(c)
      • Vars
        • S(a);N_GUARD,N_SPINS(e),P_SPINS(a)::B(A),XS(a)
      • Refutation
        • S(a);XB(A)
  • Actual
    • Q(E);N_PINS(e)
    • Threat
      • DUALS(4)
    • Vars
      • S(e);CHECK::QAB(E)+K(H)
      • S(e);CHECK,SBLOCK::S(B)
      • S(e);CHECK,P_SPINS(e),XP(F)::QAB(E)+K(H),XP(i)
      • S(e);CHECK,XP(G)::QAB(E)+K(H),XS(e)
      • S(e);CHECK,XP(I)::QAB(E)+K(H),XS(e)
      • S(a);XS(D)::QAB(E)+K(H)
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