MESON Chess Problem Database

Problem Display
PID: 271046 (3N4/2nKn3/4p3/1p1N1p2/1P1k1P2/2R1R2p/4b3/7Q w - - 0 1)

Haring, Jacobus

Schakend Nederland, 1966

3N4/2nKn3/4p3/1p1N1p2/1P1k1P2/2R1R2p/4b3/7Q

#2

8 + 8

15601 Albrecht-Leiss-Degener Collection 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Bd1
      • 2.Red3#
      • 2.Qxd1#
    • 1...Bd3
      • 2.Rexd3#
    • 1...Bg4
      • 2.Red3#
    • 1...Bh5
      • 2.Red3#
    • 1...Scxd5
      • 2.Sxe6#
    • 1...Sa6
      • 2.Sxe6#
    • 1...Sa8
      • 2.Sxe6#
    • 1...Se8
      • 2.Sxe6#
    • 1...Sexd5
      • 2.Sc6#
    • 1...Sc6
      • 2.Sxc6#
    • 1...Sg6
      • 2.Sc6#
    • 1...Sc8
      • 2.Sc6#
    • 1...Sg8
      • 2.Sc6#
  • Tries
    • 1.Sxc7?
      • threat
        • 2.Scxe6#
        • 2.Sdxe6#
      • 1...Bd3
        • 2.Rexd3#
      • 1...Bf3
        • 2.Sdxe6#
      • 1...e5
        • 2.Sce6#
        • 2.Sde6#
      • 1...Bc4!
    • 1.Sxe7?
      • threat
        • 2.Sec6#
        • 2.Sdc6#
      • 1...Bd3
        • 2.Rexd3#
      • 1...Bf3!
    • 1.Rcd3+?
      • 1...Kc4
        • 2.Qc1#
      • 1...Bxd3!
    • 1.Re4+?
      • 1...Kxd5
        • 2.Rc5#
      • 1...fxe4!
    • 1.Qd1+?
      • 1...Bd3
        • 2.Qxd3#
      • 1...Bxd1!
    • 1.Qg1?
      • threat
        • 2.Re5#
      • 1...Kxd5
        • 2.Re5#
      • 1...Scxd5
        • 2.Sxe6#
      • 1...Sexd5
        • 2.Sc6#
      • 1...exd5
        • 2.Qg7#
      • 1...e5
        • 2.Rxe5#
      • 1...h2!
  • Keys
    • 1.Qa1!
      • threat
        • 2.Rc5#
      • 1...Kxd5
        • 2.Rc5#
      • 1...Scxd5
        • 2.Sxe6#
      • 1...Sexd5
        • 2.Sc6#
      • 1...exd5
        • 2.Qa7#
      • 1...Bc4
        • 2.Rcd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 10
  • Sets
    • B(a);N_GUARD::R1(C),XB(a)
    • B(a);N_GUARD::R1(C)
    • S(g);N_GUARD,XS(F)::S(H),XP(f)
    • S(g);N_GUARD::S(H),XP(f)
    • S(h);N_GUARD,XS(F)::S(H)
    • S(h);N_GUARD::S(H),XS(h)
    • S(h);N_GUARD::S(H)
  • Tries
    • Try
      • S(F);XS(g)
      • Threat
        • DUALS(2)
      • Vars
        • B(a);N_GUARD::R1(C),XB(a)
        • B(a);::S(H),XP(f)
      • Refutation
        • B(a);
    • Try
      • S(F);XS(h)
      • Threat
        • DUALS(2)
      • Vars
        • B(a);N_GUARD::R1(C),XB(a)
      • Refutation
        • B(a);
    • Try
      • R(B);CHECK
      • Vars
        • K(c);P-FLIGHT,S_CUTB(a)::QAR(A)
      • Refutation
        • B(a);XR(B)
    • Try
      • R(C);CHECK
      • Vars
        • K(c);N_GUARD,P-FLIGHT,S_CUTP(e),XS(F)::R1(B)
      • Refutation
        • P(e);XR(C)
    • Try
      • Q(A);CHECK
      • Vars
        • B(a);N_GUARD,P_SPINB(a)::QAR1(A),XB(a)
      • Refutation
        • B(a);XQ(A)
    • Try
      • Q(A);
      • Threat
        • QAB(A)+R(C)
      • Vars
        • K(c);P-FLIGHT,XS(F)::R1(C)
        • S(g);N_GUARD,SBLOCK,XS(F)::S(H),XP(f)
        • S(h);N_GUARD,SBLOCK,XS(F)::S(H)
        • P(f);N_GUARD,SBLOCK,XS(F)::QAB(A)
        • P(f);::QAB(A)+R(C),XP(f)
      • Refutation
        • P(b);
  • Actual
    • Q(A);
    • Threat
      • QAB(A)+R(B)
    • Vars
      • K(c);P-FLIGHT,XS(F)::R1(B)
      • S(g);N_GUARD,SBLOCK,XS(F)::S(H),XP(f)
      • S(h);N_GUARD,SBLOCK,XS(F)::S(H)
      • P(f);SBLOCK,XS(F)::QAB(A)
      • B(a);SBLOCK::QAB(A)+R(B),DCHECK
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