MESON Chess Problem Database

Problem Display
PID: 235192 (1B6/8/4PbP1/4NP1p/R3qk2/2K1pNRQ/2P1PP2/6rB w - - 0 1)

Haring, Jacobus

Schach, 1977

1B6/8/4PbP1/4NP1p/R3qk2/2K1pNRQ/2P1PP2/6rB

#2

14 + 6

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qb4+
      • 2.Rxb4#
    • 1...Qc4+
      • 2.Rxc4#
    • 1...Qd4+
      • 2.Rxd4#
    • 1...Rxg3
      • 2.fxg3#
    • 1...Bh4
      • 2.Sd3#
      • 2.Sc6#
      • 2.Sd7#
      • 2.Sf7#
    • 1...Bxe5+
      • 2.Bxe5#
    • 1...Bg5
      • 2.Sd3#
      • 2.Sc6#
      • 2.Sd7#
      • 2.Sf7#
    • 1...Be7
      • 2.Sd3#
    • 1...Bd8
      • 2.Sd3#
    • 1...h4
      • 2.Qg4#
  • Tries
    • 1.Sxg1?
      • threat
        • 2.Rxe4#
        • 2.fxe3#
      • 1...Qb4+
        • 2.Rxb4#
      • 1...Qc4+
        • 2.Rxc4#
      • 1...Qd4+
        • 2.Rxd4#
      • 1...Qxa4
        • 2.fxe3#
      • 1...exf2
        • 2.Rxe4#
        • 2.e3#
      • 1...Bxe5+!
    • 1.Sh4?
      • threat
        • 2.Rxe4#
        • 2.fxe3#
      • 1...Qb4+
        • 2.Rxb4#
      • 1...Qc4+
        • 2.Rxc4#
      • 1...Qd4+
        • 2.Rxd4#
      • 1...Qxa4
        • 2.fxe3#
      • 1...Rxh1
        • 2.Sg2#
        • 2.fxe3#
      • 1...Rxg3
        • 2.Qxg3#
      • 1...exf2
        • 2.Rxe4#
        • 2.e3#
      • 1...Rg2
        • 2.Sxg2#
        • 2.fxe3#
      • 1...Bxe5+!
  • Keys
    • 1.Sd4!
      • threat
        • 2.Sd3#
      • 1...Qxc2+
        • 2.Sxc2#
      • 1...Qd3+
        • 2.Sxd3#
      • 1...Qc6+
        • 2.Sdxc6#
      • 1...Qxd4+
        • 2.Rxd4#
      • 1...Qxh1
        • 2.Sdf3#
      • 1...Qxe5
        • 2.fxe3#
      • 1...Rxg3
        • 2.Qxg3#
      • 1...Bxe5
        • 2.Qh4#
      • 1...Qg2
        • 2.Sdf3#
      • 1...Qf3
        • 2.Sdxf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 7
    • REMOVED MATES = 5
  • Sets
    • Q(c);CHECK,OGATEB::R(I),XQ(c)
    • Q(c);CHECK,N_PINS(J),OGATEB::R(I),XQ(c)
    • R(a);OGATE,XR(G)::P(D),XR(a)
    • B(f);CHECK,OGATE,P_SPINB(f),XS(J)::B(N),XB(f)
    • B(f);N_PINS(J)::B(N)+S(J),DCHECK
    • P(e);N_GUARD::QAR1(H)
  • Tries
    • Try
      • S(F);XR(a)
      • Threat
        • DUALS(2)
      • Vars
        • Q(c);CHECK,OGATEB::R(I),XQ(c)
        • Q(c);CHECK,N_PINS(J),OGATEB::R(I),XQ(c)
        • Q(c);N_SPINQ(c),XR(I)::P(D),XP(b)
      • Refutation
        • B(f);CHECK,P_SPINB(f),XS(J)
    • Try
      • S(F);
      • Threat
        • DUALS(2)
      • Vars
        • Q(c);CHECK,OGATEB::R(I),XQ(c)
        • Q(c);CHECK,N_PINS(J),OGATEB::R(I),XQ(c)
        • Q(c);N_SPINQ(c),XR(I)::P(D),XP(b)
        • R(a);OGATE,XR(G)::QAB1(H),XR(a)
      • Refutation
        • B(f);CHECK,P_SPINB(f),XS(J)
  • Actual
    • S(F);N_PINQ(c),N_SPINS(J)
    • Threat
      • B(N)+S(J),DCHECK
    • Vars
      • Q(c);CHECK,XP(B)::R(I)+S(F),XQ(c)
      • Q(c);CHECK::B(N)+S(J),DCHECK,XQ(c)
      • Q(c);CHECK::R(I)+S(F),XQ(c)
      • Q(c);CHECK,OGATE,P_SPINQ(c),XS(F)::R(I),XQ(c)
      • Q(c);XB(A)::R(I)+S(F)
      • Q(c);N_GUARD,P_PINS(F),P_SPINQ(c),XS(J)::P(D),XP(b)
      • R(a);OGATE,XR(G)::QAB1(H),XR(a)
      • B(f);N_GUARD,P_PINS(F),P_SPINB(f),XS(J)::QAR2(H)
      • Q(c);::R(I)+S(F)
      • Q(c);::R(I)+S(F),XQ(c)
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