MESON Chess Problem Database

Problem Display
PID: 225307 (1N2N3/B3p2n/6bR/3k4/P2nrP2/1p1PQ2B/8/7K w - - 0 1)

Laskin, Irwin

US Problem Bulletin, 1967

1N2N3/B3p2n/6bR/3k4/P2nrP2/1p1PQ2B/8/7K

#2

10 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Re5
      • 2.Qxd4#
      • 2.Qxe5#
    • 1...Re6
      • 2.Qxd4#
    • 1...Bf5
      • 2.Sc7#
    • 1...Bh5
      • 2.Sc7#
      • 2.Qxe4#
    • 1...Bf7
      • 2.Sc7#
      • 2.Qxe4#
    • 1...Bxe8
      • 2.Qxe4#
    • 1...Sc2
      • 2.Qc5#
    • 1...Se2
      • 2.Qc5#
    • 1...Sf3
      • 2.Qc5#
    • 1...Sb5
      • 2.Qc5#
    • 1...Sf5
      • 2.Qxe4#
    • 1...Sc6
      • 2.Qc5#
  • Tries
    • 1.Sa6?
      • threat
        • 2.Sb4#
      • 1...Kc6
        • 2.Qxe4#
      • 1...Sf5
        • 2.Qxe4#
      • 1...Sc2
        • 2.Qc5#
      • 1...Se2
        • 2.Qc5#
      • 1...Sf3
        • 2.Qc5#
      • 1...Sb5
        • 2.Qc5#
      • 1...Sc6
        • 2.Sac7#
        • 2.Qc5#
      • 1...Se6!
    • 1.Rxg6?
      • threat
        • 2.Sc7#
        • 2.Qxe4#
      • 1...Rxe3
        • 2.Sc7#
      • 1...Rxf4
        • 2.Sc7#
      • 1...Sg5
        • 2.Sc7#
      • 1...Re5
        • 2.Sc7#
        • 2.Qxd4#
        • 2.Qxe5#
      • 1...Re6
        • 2.Qxd4#
      • 1...Sb5
        • 2.Qc5#
        • 2.Qxe4#
      • 1...Se6
        • 2.Qxe4#
      • 1...e6
        • 2.Qxe4#
      • 1...Sf6!
    • 1.dxe4+?
      • 1...Kc4
        • 2.Qxd4#
      • 1...Bxe4+!
  • Keys
    • 1.Sc6!
      • threat
        • 2.Sb4#
      • 1...Kxc6
        • 2.Qxe4#
      • 1...Sxc6
        • 2.Qc5#
      • 1...Sf5
        • 2.Qxe4#
      • 1...Sc2
        • 2.Qc5#
      • 1...Se2
        • 2.Qc5#
      • 1...Sf3
        • 2.Qc5#
      • 1...Sb5
        • 2.Qc5#
      • 1...Se6
        • 2.Sxe7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • R(c);N_GUARD::QAR1(C),XS(b)
    • B(e);::S(J)
    • B(e);N_GUARD,XS(J)::QAB1(C),XR(c)
    • S(b);OGATE::QAR1(C)
    • S(b);S_CUTB(e)::QAB1(C),XR(c)
  • Tries
    • Try
      • S(I);
      • Threat
        • S(I)
      • Vars
        • K(d);P_SPINB(e),S_FLIGHT::QAB(C),XR(c)
        • S(b);S_CUTB(e)::QAB1(C),XR(c)
        • S(b);OGATE::QAR1(C)
      • Refutation
        • S(b);
    • Try
      • R(G);XB(e)
      • Threat
        • DUALS(2)
      • Vars
        • R(c);XQ(C)::S(J)
        • R(c);XP(F)::S(J)
        • S(g);::S(J)
        • R(c);N_GUARD::QAR1(C),XS(b)
        • S(b);::QAB1(C),XR(c)
        • P(f);::QAB1(C),XR(c)
      • Refutation
        • S(g);
    • Try
      • P(B);CHECK,XR(c)
      • Vars
        • K(d);S_FLIGHT::QAR1(C),XS(b)
      • Refutation
        • B(e);CHECK,XP(B)
  • Actual
    • S(I);
    • Threat
      • S(I)
    • Vars
      • K(d);P_SPINB(e),S_FLIGHT,XS(I)::QAB(C),XR(c)
      • S(b);OGATE,XS(I)::QAR1(C)
      • S(b);S_CUTB(e)::QAB1(C),XR(c)
      • S(b);OGATE::QAR1(C)
      • S(b);S_CUTR(c)::S(I),XP(f)
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