MESON Chess Problem Database

Problem Display
PID: 166293 (5bb1/8/8/2N5/2B1qp2/R2pkP1p/1Bp1p1pR/2K1Qn2 w - - 0 1)

Chepizhni, Viktor Ivanovich

Comm., StrateGems, 2016

5bb1/8/8/2N5/2B1qp2/R2pkP1p/1Bp1p1pR/2K1Qn2

#2

8 + 11

145 StrateGems 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Qxf3
      • 2.Rxd3#
    • 1...Qc6
      • 2.Rxd3#
    • 1...Qb7
      • 2.Rxd3#
    • 1...Qa8
      • 2.Rxd3#
    • 1...Qe5
      • 2.Rxd3#
    • 1...Qe6
      • 2.Rxd3#
    • 1...Qe7
      • 2.Rxd3#
    • 1...Qe8
      • 2.Rxd3#
    • 1...g1Q
      • 2.Qxe2#
    • 1...g1S
      • 2.Qf2#
    • 1...g1B
      • 2.Qxe2#
    • 1...g1R
      • 2.Qf2#
      • 2.Qxe2#
  • Tries
    • 1.Sxe4?
      • threat
        • 2.Rxd3#
        • 2.Qf2#
      • 1...Bxa3
        • 2.Qf2#
      • 1...Bxc4
        • 2.Qf2#
      • 1...g1Q
        • 2.Rxd3#
        • 2.Qxe2#
      • 1...g1B
        • 2.Rxd3#
        • 2.Qxe2#
      • 1...Kxf3!
    • 1.Bxd3?
      • threat
        • 2.Qxe2#
      • 1...Kxf3
        • 2.Bxe2#
      • 1...Qxd3
        • 2.Rxd3#
      • 1...Qxf3
        • 2.Bc4#
      • 1...g1S
        • 2.Qf2#
      • 1...Sg3!
    • 1.Rxg2?
      • threat
        • 2.Qf2#
        • 2.Qxe2#
      • 1...Kxf3
        • 2.Qf2#
      • 1...Qxf3
        • 2.Rxd3#
      • 1...Sg3
        • 2.Qf2#
      • 1...hxg2!
  • Keys
    • 1.Sxd3!
      • threat
        • 2.Qf2#
      • 1...Kxf3
        • 2.Se5#
      • 1...Qxd3
        • 2.Rxd3#
      • 1...Qxf3
        • 2.Sc5#
      • 1...g1Q
        • 2.Qxe2#
      • 1...g1B
        • 2.Qxe2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 8
  • Sets
    • Q(h);N_GUARD,SBLOCK,XP(F)::R1(E),XP(e)
    • Q(h);N_GUARD::R1(E),XP(e)
    • P(d);::QAR1(B),XP(c)
    • P(d);::QAB1(B)
  • Tries
    • Try
      • S(H);XQ(h)
      • Threat
        • DUALS(2)
      • Vars
        • B(j);P_PINB(C),XR(E)::QAB1(B)
        • B(k);XB(G)::QAB1(B)
      • Refutation
        • K(f);N_SPINP(c),P-FLIGHT,P_SPINP(e),XP(F)
    • Try
      • B(G);XP(e)
      • Threat
        • QAR1(B),XP(c)
      • Vars
        • K(f);N_SPINP(c),P-FLIGHT,XP(F)::R(E)+B(G),DCHECK,XP(c)
        • Q(h);OGATE,P_SPINQ(h),XB(G)::R1(E),XQ(h)
        • Q(h);N_GUARD,SBLOCK,XP(F)::R(E)+B(G)
        • P(d);::QAB1(B)
      • Refutation
        • S(a);
    • Try
      • R(D);XP(d)
      • Threat
        • DUALS(2)
      • Vars
        • K(f);N_SPINP(c),P-FLIGHT,P_SPINP(e),XP(F)::QAR1(B)
        • Q(h);N_GUARD,SBLOCK,XP(F)::R1(E),XP(e)
        • S(a);::QAB1(B)
      • Refutation
        • P(g);XR(D)
  • Actual
    • S(H);XP(e)
    • Threat
      • QAB1(B)
    • Vars
      • K(f);N_SPINP(c),P-FLIGHT,XP(F)::R(E)+S(H),DCHECK
      • Q(h);OGATE,P_SPINQ(h),XS(H)::R1(E),XQ(h)
      • Q(h);N_GUARD,SBLOCK,XP(F)::R(E)+S(H)
      • P(d);::QAR1(B),XP(c)
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