MESON Chess Problem Database

Problem Display
PID: 195846 (8/3p1pB1/3Pk1np/K2R2P1/B2R1pr1/1p3N1Q/2b5/8 w - - 0 1)

Murashev, Pavel Aleksandrovich

1st Place, Russian Championship, 2016

8/3p1pB1/3Pk1np/K2R2P1/B2R1pr1/1p3N1Q/2b5/8

#2

9 + 9

145 StrateGems 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Sh4
      • 2.Re5#
    • 1...Se5
      • 2.Rxe5#
    • 1...Se7
      • 2.Re5#
    • 1...Sf8
      • 2.Re5#
    • 1...Sh8
      • 2.Re5#
    • 1...hxg5
      • 2.Sxg5#
  • Tries
    • 1.Se5?
      • threat
        • 2.Bxd7#
      • 1...Kf5
        • 2.Qxg4#
      • 1...Sxe5
        • 2.Rxe5#
      • 1...Sf8!
    • 1.Bxb3?
      • threat
        • 2.Re5#
      • 1...Se5
        • 2.Rxe5#
      • 1...Bxb3!
    • 1.Qxg4+?
      • 1...Bf5
        • 2.Qxf5#
      • 1...f5!
    • 1.Qxh6?
      • threat
        • 2.Re5#
      • 1...Rxg5
        • 2.Sxg5#
      • 1...f5
        • 2.Qxg6#
      • 1...f6!
  • Keys
    • 1.Rf5!
      • threat
        • 2.Rf6#
      • 1...Kxf5
        • 2.Bxd7#
      • 1...Rxg5
        • 2.Re5#
      • 1...Bxf5
        • 2.Bxb3#
      • 1...f6
        • 2.Rxf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 6
  • Sets
    • S(f);N_GUARD::R1(F)
    • S(f);N_GUARD::R1(F),XS(f)
    • P(g);XP(G)::S(A),XP(g)
  • Tries
    • Try
      • S(A);
      • Threat
        • B(C),XP(h)
      • Vars
        • K(e);S_FLIGHT::QAB1(B),XR(d)
        • S(f);OGATE,XS(A)::R1(F),XS(f)
      • Refutation
        • S(f);
    • Try
      • B(C);XP(b)
      • Threat
        • B(C)+R(F),DCHECK
      • Vars
        • S(f);::B(C)+R(F),DCHECK,XS(f)
      • Refutation
        • B(a);XB(C)
    • Try
      • Q(B);CHECK,XR(d)
      • Vars
        • B(a);N_GUARD,P_SPINB(a)::QAB1(B),XB(a)
      • Refutation
        • P(i);P_SPINP(i)
    • Try
      • Q(B);N_PINR(d),P_PINS(f),XP(g)
      • Threat
        • R1(F)
      • Vars
        • R(d);P_PINR(F),XP(G)::S(A),XR(d)
        • P(i);N_GUARD,S_CUTB(a)::QAR2(B),XS(f)
      • Refutation
        • P(i);N_SPINS(f)
  • Actual
    • R(F);N_PINR(d)
    • Threat
      • R1(F)
    • Vars
      • K(e);P_SPINR(d),S_FLIGHT,XR(F)::B(C),XP(h)
      • R(d);P_PINR(F),XP(G)::QAB(B)+R(F),DCHECK
      • B(a);N_GUARD,SBLOCK,XR(F)::B(C),XP(b)
      • P(i);::R1(F),XP(i)
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