MESON Chess Problem Database

Problem Display
PID: 94894 (8/br1p4/p7/Qb1k4/p2P4/N1P3B1/1K4Nr/4R2B w - - 0 1)

Sheppard, Charles William

British Chess Magazine, 1944

8/br1p4/p7/Qb1k4/p2P4/N1P3B1/1K4Nr/4R2B

#2

9 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rxg2+
      • 2.Bxg2#
    • 1...Rh4
      • 2.Sxh4#
    • 1...Rh5
      • 2.Sh4#
    • 1...Rh6
      • 2.Sh4#
    • 1...Rh7
      • 2.Sh4#
    • 1...Rh8
      • 2.Sh4#
  • Keys
    • 1.Qb4!
      • threat
        • 2.Qd6#
      • 1...Rxg2+
        • 2.Bxg2#
      • 1...Kc6
        • 2.Qd6#
      • 1...Be2
        • 2.Sf4#
      • 1...Rh6
        • 2.Sf4#
        • 2.Sh4#
      • 1...Rb6
        • 2.Qc5#
      • 1...Bf1
        • 2.Qxb7#
      • 1...Bd3
        • 2.Qxb7#
      • 1...Bc4
        • 2.Qxb7#
      • 1...Bc6
        • 2.Re5#
      • 1...Bc5
        • 2.Qxc5#
      • 1...Bb8
        • 2.Qc5#
      • 1...d6
        • 2.Qxd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 10
    • REMOVED MATES = 5
  • Sets
    • R(a);CHECK,OGATE,P_SPINR(a),XS(D)::B(B),XR(a)
    • R(a);N_PINS(D)::B(B)+S(D),XR(a)
    • R(a);N_PINS(D)::B(B)+S(D)
  • Actual
    • Q(I);N_PINB(c)
    • Threat
      • QAR1(I)
    • Vars
      • R(a);CHECK,OGATE,P_SPINR(a),XS(D)::B(B),XR(a)
      • K(d);S_FLIGHT::QAR1(I)
      • B(c);N_PINS(D),P_PINQ(I)::B(B)+S(D),DCHECK
      • R(g);S_CUTB(f)::QAR1(I)
      • B(c);OGATE,P_PINQ(I)::QAB(I),XR(g)
      • B(c);P_PINQ(I),SBLOCK::R1(A)
      • B(f);N_GUARD::QAR1(I),XB(f)
      • B(f);N_GUARD::QAR1(I)
      • P(h);::QAR1(I),XP(h)
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