MESON Chess Problem Database

Problem Display
PID: 16935 (8/4R2K/6Q1/2p5/2p5/2B3p1/3PB1R1/2qbk2n w - - 0 1)

Wenman, Francis Percival (aka Percy Wenman)

One Hundred Published Problems, 1944

8/4R2K/6Q1/2p5/2p5/2B3p1/3PB1R1/2qbk2n

#2

7 + 7

5454 Near Snap 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Qb1
      • 2.d3#
      • 2.d4#
    • 1...Sf2
      • 2.Rg1#
  • Tries
    • 1.Bxd1+?
      • 1...Kxd1
        • 2.Rg1#
      • 1...Kf1!
    • 1.Qf5?
      • threat
        • 2.Rg1#
        • 2.Qf1#
      • 1...Bxe2
        • 2.Rg1#
      • 1...Qb1
        • 2.Rg1#
        • 2.d3#
        • 2.d4#
      • 1...Qc2
        • 2.Rg1#
      • 1...Bc2
        • 2.Rg1#
      • 1...Sf2
        • 2.Rg1#
      • 1...Qxc3!
    • 1.Qxg3+?
      • 1...Sf2
        • 2.Rg1#
        • 2.Qxf2#
      • 1...Sxg3!
  • Keys
    • 1.Qb1!
      • 1...Qxb1+
        • 2.d3#
      • 1...Qc2+
        • 2.Bd3#
      • 1...Bc2+
        • 2.d3#
      • 1...Qxd2
        • 2.Bd3#
        • 2.Bxc4#
        • 2.Qxd1#
      • 1...Qxc3
        • 2.Qxd1#
      • 1...Bxe2
        • 2.Qxc1#
      • 1...Qb2
        • 2.Bd3#
        • 2.Bxc4#
        • 2.Qxd1#
      • 1...Qa3
        • 2.Bd3#
        • 2.Bxc4#
        • 2.Qxd1#
      • 1...Bb3
        • 2.d3#
        • 2.d4#
      • 1...Ba4
        • 2.d3#
        • 2.d4#
      • 1...Sf2
        • 2.Rg1#

Anticipated by 21689(1920)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • S(d);SBLOCK::R(C)
  • Tries
    • Try
      • B(B);CHECK,XB(b)
      • Vars
        • K(c);P-FLIGHT,XB(B)::R(C)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(E);
      • Threat
        • DUALS(2)
      • Vars
        • B(b);P_SPINB(b),XB(B)::R(C)
        • Q(a);P_PINQ(E)::R(C)
        • B(b);P_PINQ(E)::R(C)
        • S(d);::R(C)
      • Refutation
        • Q(a);XB(D)
    • Try
      • Q(E);CHECK,XP(e)
      • Refutation
        • S(d);XQ(E)
  • Actual
    • Q(E);
    • Vars
      • Q(a);CHECK,N_GUARD,XQ(E)::B(D)+P(A)
      • Q(a);CHECK,P_SPINB(b)::R(F)+B(B)
      • B(b);CHECK,P_SPINQ(a)::B(D)+P(A)
      • Q(a);OGATE,P_SPINB(b),XB(D)::QAR1(E),XB(b)
      • B(b);OGATEB,P_SPINB(b),P_SPINQ(a),XB(B)::QAR2(E),XQ(a)
      • S(d);SBLOCK::R(C)
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