MESON Chess Problem Database

Problem Display
PID: 237695 (4K1B1/p2PNp2/r2Nk1P1/b1P1n1P1/pp6/1q1Q3b/4P3/4R3 w - - 0 1)

Bakker, Peter Arie

Schogt, Hans

The Problemist, 1988

4K1B1/p2PNp2/r2Nk1P1/b1P1n1P1/pp6/1q1Q3b/4P3/4R3

#2

11 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qc2
      • 2.Qd5#
    • 1...Qd5
      • 2.Qxd5#
    • 1...Qb1
      • 2.Qd5#
    • 1...Qb2
      • 2.Qd5#
    • 1...Qa3
      • 2.Qd5#
    • 1...Qc3
      • 2.Qd5#
    • 1...Rb6
      • 2.d8S#
    • 1...Rxd6
      • 2.Qxd6#
    • 1...Bf1
      • 2.Qf5#
    • 1...Bg2
      • 2.Qf5#
    • 1...Bf5
      • 2.Qxf5#
    • 1...Sxd3
      • 2.exd3#
    • 1...Sf3
      • 2.exf3#
    • 1...Sc4
      • 2.Qd5#
    • 1...Sg4
      • 2.Qf5#
  • Keys
    • 1.Sxf7!
      • threat
        • 2.Sd8#
      • 1...Sxd3
        • 2.exd3#
      • 1...Sxg6
        • 2.Qxg6#
      • 1...Sxd7
        • 2.Qxd7#
      • 1...Sxf7
        • 2.Qe4#
      • 1...Bd8
        • 2.Sxd8#
      • 1...Sf3
        • 2.exf3#
      • 1...Sc4
        • 2.Qd5#
      • 1...Sg4
        • 2.Qf5#
      • 1...Sc6
        • 2.Qd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 11
  • Sets
    • Q(a);N_GUARD::QAB1(C)
    • Q(a);N_GUARD::QAB1(C),XQ(a)
    • R(g);S_CUTB(e)::P=S
    • R(g);OGATE,XS(F)::QAR1(C),XR(g)
    • B(b);N_GUARD::QAB1(C)
    • B(b);N_GUARD::QAB1(C),XB(b)
    • S(f);OGATE,XQ(C)::R(A)+P(B),XS(f)
    • S(f);OGATE::R(A)+P(B),XS(f)
    • S(f);S_CUTQ(a)::QAB1(C)
    • S(f);S_CUTB(b)::QAB1(C)
  • Actual
    • S(F);XP(j)
    • Threat
      • B(K)+S(F),DCHECK
    • Vars
      • S(f);OGATE,XQ(C)::R(A)+P(B),XS(f)
      • S(f);OGATE,XP(G)::QAR2(C),XS(f)
      • S(f);OGATE,XP(H)::QAB1(C),XS(f)
      • S(f);OGATEB,P_SPINS(f),XS(F)::QAR2(C)
      • B(e);::B(K)+S(F),DCHECK,XB(e)
      • S(f);OGATE::R(A)+P(B),XS(f)
      • S(f);S_CUTQ(a)::QAB1(C)
      • S(f);S_CUTB(b)::QAB1(C)
      • S(f);S_CUTR(g)::QAR1(C)
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