MESON Chess Problem Database

Problem Display
PID: 190875 (Bb5r/1Pp5/kB3R2/NNKp4/R1P5/1P2p3/4Q3/r4q2 w - - 0 1)

Lindstrom, Ismo

Suomen Shakki, 1983

Bb5r/1Pp5/kB3R2/NNKp4/R1P5/1P2p3/4Q3/r4q2

#2

11 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe2
      • 2.Bxc7#
    • 1...Qg2
      • 2.Bxc7#
    • 1...Qb1
      • 2.Bxc7#
    • 1...Qc1
      • 2.Bxc7#
    • 1...Qd1
      • 2.Bxc7#
    • 1...Qe1
      • 2.Bxc7#
    • 1...Qg1
      • 2.Bxc7#
    • 1...Qh1
      • 2.Bxc7#
    • 1...Rb1
      • 2.Sc6#
    • 1...Rc1
      • 2.Sc6#
    • 1...Rd1
      • 2.Sc6#
    • 1...Re1
      • 2.Sc6#
    • 1...Rc8
      • 2.bxc8Q#
      • 2.bxc8B#
    • 1...Ba7
      • 2.Sxc7#
    • 1...cxb6+
      • 2.Rxb6#
  • Tries
    • 1.Ba7+?
      • 1...c6
        • 2.Rxc6#
      • 1...Qxf6!
    • 1.Qa2?
      • threat
        • 2.Sc6#
      • 1...Qxc4+
        • 2.Sxc4#
      • 1...cxb6+
        • 2.Rxb6#
      • 1...Qe1
        • 2.Bxc7#
      • 1...c6
        • 2.Sxc6#
      • 1...Rxa2!
  • Keys
    • 1.cxd5!
      • threat
        • 2.Sxc7#
      • 1...Qc1+
        • 2.Sc3#
      • 1...Rc1+
        • 2.Sc4#
      • 1...cxb6+
        • 2.Rxb6#
      • 1...Qxe2
        • 2.Bxc7#
      • 1...c6
        • 2.Sc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 10
  • Sets
    • Q(b);N_GUARD,XQ(A)::R(I)+B(H),XP(f)
    • Q(b);N_GUARD::R(I)+B(H),XP(f)
    • Q(b);N_GUARD,P_PINP(D)::R(I)+B(H),XP(f)
    • R(a);N_GUARD::R(C)+S(E)
    • R(a);N_GUARD,P_PINP(D)::R(C)+S(E)
    • R(h);OGATE::PXR(h)=Q
    • B(g);N_GUARD,P_PINB(H)::S(F),XP(f)
    • P(f);CHECK,OGATE,P_SPINP(f),XB(H)::R1(I),XP(f)
  • Tries
    • Try
      • B(H);CHECK
      • Vars
        • P(f);P_SPINP(f)::R(I),XP(f)
      • Refutation
        • Q(b);XR(I)
    • Try
      • Q(A);
      • Threat
        • R(C)+S(E)
      • Vars
        • Q(b);CHECK,XP(D)::R(C)+S(E),XQ(b)
        • P(f);CHECK,OGATE,P_SPINP(f),XB(H)::R1(I),XP(f)
        • Q(b);N_GUARD::R(I)+B(H),XP(f)
        • P(f);::R(C)+S(E),XP(f)
      • Refutation
        • R(a);XQ(A)
  • Actual
    • P(D);XP(d)
    • Threat
      • QAB(A)+S(F),DCHECK,XP(f)
    • Vars
      • Q(b);CHECK,N_GUARD::QAB(A)+S(F)
      • R(a);CHECK,N_GUARD::R(C)+S(E)
      • P(f);CHECK,OGATE,P_SPINP(f),XB(H)::R1(I),XP(f)
      • Q(b);N_GUARD,XQ(A)::R(I)+B(H),XP(f)
      • P(f);::QAB(A)+S(F),DCHECK
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