MESON Chess Problem Database

Problem Display
PID: 139655 (8/4B3/8/4K3/8/1Q6/8/kn1n1R2 w - - 0 1)

Davis, Edward

Kipping, Cyril Stanley

The Problemist, 1937

8/4B3/8/4K3/8/1Q6/8/kn1n1R2

#2

4 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Sb2
      • 2.Qa3#
    • 1...Sf2
      • 2.Rxb1#
      • 2.Qxb1#
      • 2.Qa3#
    • 1...Se3
      • 2.Rxb1#
      • 2.Qxb1#
      • 2.Qa3#
  • Tries
    • 1.Ba3?
      • 1...Sbc3
        • 2.Qb2#
      • 1...Sd2
        • 2.Qb2#
      • 1...Sb2
        • 2.Bxb2#
        • 2.Qxb2#
      • 1...Sf2
        • 2.Bb2#
        • 2.Rxb1#
        • 2.Qxb1#
        • 2.Qb2#
      • 1...Sdc3
        • 2.Bb2#
        • 2.Qb2#
      • 1...Se3
        • 2.Bb2#
        • 2.Rxb1#
        • 2.Qxb1#
        • 2.Qb2#
      • 1...Sxa3!
    • 1.Qxd1?
      • threat
        • 2.Qxb1#
      • 1...Ka2
        • 2.Qxb1#
      • 1...Kb2!
  • Keys
    • 1.Bb4!
      • 1...Sbc3
        • 2.Bxc3#
      • 1...Sd2
        • 2.Bc3#
      • 1...Sa3
        • 2.Bc3#
      • 1...Sb2
        • 2.Qa3#
      • 1...Sf2
        • 2.Bc3#
        • 2.Rxb1#
        • 2.Qxb1#
        • 2.Qa3#
      • 1...Sdc3
        • 2.Bxc3#
      • 1...Se3
        • 2.Bc3#
        • 2.Rxb1#
        • 2.Qxb1#
        • 2.Qa3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • S(c);P_SPINS(b)::QAR2(B)
  • Tries
    • Try
      • B(D);
      • Vars
        • S(b);P_SPINS(c)::QAB1(B)
      • Refutation
        • S(b);P_SPINS(c),XB(D)
    • Try
      • Q(B);P_PINS(b),XS(c)
      • Threat
        • QAR1(B),XS(b)
      • Vars
        • K(a);N_SPINS(b),P-FLIGHT::QAB1(B),XS(b)
      • Refutation
        • K(a);N_SPINS(b),S_FLIGHT
  • Actual
    • B(D);
    • Vars
      • S(b);N_GUARD,P_SPINS(c)::B(D),XS(b)
      • S(b);N_GUARD,P_SPINS(c)::B(D)
      • S(c);P_SPINS(b)::QAR2(B)
      • S(c);N_GUARD,P_SPINS(b)::B(D),XS(c)
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