MESON Chess Problem Database

Problem Display
PID: 242240 (3KR1B1/n1pn2p1/R1bk2r1/5P2/NP1P1r2/4b1Q1/8/8 w - - 0 1)

Kisis, Imants J

Schach, 1975

3KR1B1/n1pn2p1/R1bk2r1/5P2/NP1P1r2/4b1Q1/8/8

#2

9 + 9

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sc5
      • 2.bxc5#
    • 1...Se5
      • 2.dxe5#
    • 1...Sb6
      • 2.Qxg6#
    • 1...Sb8
      • 2.Qxg6#
  • Tries
    • 1.Sb2?
      • threat
        • 2.Sc4#
      • 1...Se5
        • 2.dxe5#
      • 1...Sb6
        • 2.Qxg6#
      • 1...Re6!
    • 1.Sc5?
      • threat
        • 2.Se4#
        • 2.Sb7#
      • 1...Rxg3
        • 2.Sb7#
      • 1...Sxc5
        • 2.bxc5#
      • 1...Se5
        • 2.Sb7#
        • 2.dxe5#
      • 1...Sb6
        • 2.Qxg6#
      • 1...Sf6
        • 2.Sb7#
      • 1...Re6!
    • 1.Sb6?
      • threat
        • 2.Sc4#
      • 1...Sxb6
        • 2.Qxg6#
      • 1...Re6
        • 2.Rxe6#
      • 1...Se5
        • 2.dxe5#
      • 1...cxb6!
    • 1.Qxf4+?
      • 1...Se5
        • 2.Qxe5#
        • 2.dxe5#
      • 1...Bxf4!
  • Keys
    • 1.Sc3!
      • threat
        • 2.Se4#
      • 1...Rxg3
        • 2.Re6#
      • 1...Re6
        • 2.Rxe6#
      • 1...Sc5
        • 2.bxc5#
      • 1...Se5
        • 2.dxe5#
      • 1...Sb6
        • 2.Qxg6#
      • 1...Sf6
        • 2.Re6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • S(h);OGATE::P(C),XS(h)
    • S(h);N_SPINR(b),OGATE::P(D),XS(h)
    • S(h);N_GUARD,N_SPINB(c)::QAR(A),XR(e)
    • S(h);N_GUARD::QAR(A),XR(e)
  • Tries
    • Try
      • S(B);
      • Threat
        • S(B)
      • Vars
        • S(h);N_SPINR(b),OGATE::P(D),XS(h)
        • S(h);N_GUARD,N_SPINB(c)::QAR(A),XR(e)
      • Refutation
        • R(e);
    • Try
      • S(B);
      • Threat
        • DUALS(2)
      • Vars
        • R(e);N_SPINR(b),XQ(A)::S(B)
        • S(h);OGATE,XS(B)::P(C),XS(h)
        • S(h);N_GUARD,N_SPINB(c)::QAR(A),XR(e)
        • S(h);::S(B)
      • Refutation
        • R(e);
    • Try
      • S(B);N_PINB(c)
      • Threat
        • S(B)
      • Vars
        • S(h);N_GUARD,XS(B)::QAR(A),XR(e)
        • R(e);N_GUARD::R1(H),XR(e)
        • S(h);N_SPINR(b),OGATE::P(D),XS(h)
      • Refutation
        • P(g);XS(B)
    • Try
      • Q(A);CHECK,XR(b)
      • Refutation
        • B(a);XQ(A)
  • Actual
    • S(B);
    • Threat
      • S(B)
    • Vars
      • R(e);N_GUARD,N_SPINR(b),XQ(A)::R1(H)
      • R(e);N_GUARD::R1(H),XR(e)
      • S(h);OGATE::P(C),XS(h)
      • S(h);N_SPINR(b),OGATE::P(D),XS(h)
      • S(h);N_GUARD,N_SPINB(c)::QAR(A),XR(e)
      • S(h);S_CUTR(e)::R1(H)
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