MESON Chess Problem Database

Problem Display
PID: 273669 (7B/1K6/1ppN2p1/1Pr1R3/p1pkpb1Q/4p3/4PP2/N1Rn2rB w - - 0 1)

Murashev, Pavel Aleksandrovich

Shakhmatnaya kompozitsiya, 2023

7B/1K6/1ppN2p1/1Pr1R3/p1pkpb1Q/4p3/4PP2/N1Rn2rB

#2

11 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Rxb5
      • 2.Rxc4#
    • 1...Rd5
      • 2.Rxc4#
    • 1...Bh2
      • 2.Qxe4#
    • 1...Bg3
      • 2.Qxe4#
    • 1...Bxe5
      • 2.Qxe4#
    • 1...Bg5
      • 2.Qxe4#
    • 1...Bh6
      • 2.Qxe4#
    • 1...Sc3
      • 2.Sc2#
    • 1...c3
      • 2.Sc2#
    • 1...g5
      • 2.Sf5#
  • Tries
    • 1.Sxe4?
      • threat
        • 2.Sc2#
      • 1...Rxe5
        • 2.Qd8#
      • 1...Bxe5
        • 2.Sg3#
      • 1...c3!
    • 1.Bxe4?
      • threat
        • 2.Rd5#
      • 1...Rxe5
        • 2.Rxc4#
      • 1...Bxe5
        • 2.Bg2#
      • 1...Rd5
        • 2.Rxc4#
        • 2.Rxd5#
      • 1...exf2!
    • 1.Rxc5+?
      • 1...Be5
        • 2.R1xc4#
      • 1...Kxc5!
    • 1.Rf5+?
      • 1...Be5
        • 2.Qxe4#
      • 1...Re5!
    • 1.Rg5+?
      • 1...Be5
        • 2.Qxe4#
      • 1...Re5!
    • 1.Rh5+?
      • 1...Be5
        • 2.Qxe4#
      • 1...Re5!
  • Keys
    • 1.Qd8!
      • threat
        • 2.Sf5#
      • 1...Rxe5
        • 2.Sxe4#
      • 1...Rd5
        • 2.Rxc4#
      • 1...c3
        • 2.Sc2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 8
  • Sets
    • R(i);N_GUARD,XP(G)::R1(B),XP(e)
    • R(i);N_GUARD::R1(B),XP(e)
    • B(h);OGATE,P_SPINP(g)::QAR1(F),XP(g)
    • B(h);OGATE,P_SPINB(h),P_SPINP(g),XR(H)::QAR1(F),XP(g)
    • S(a);SBLOCK::S(A)
    • P(e);SBLOCK::S(A)
    • P(l);N_GUARD::S(I)
  • Tries
    • Try
      • S(I);XP(g)
      • Threat
        • S(A)
      • Vars
        • R(i);N_GUARD,P_SPINR(i),XR(H)::QAR(F)
        • B(h);P_SPINB(h),XR(H)::QAR(F)+S(I)
      • Refutation
        • P(e);
    • Try
      • B(C);XP(g)
      • Threat
        • B(K)+R(H),DCHECK
      • Vars
        • R(i);N_GUARD,P_SPINR(i),XR(H)::R1(B),XP(e)
        • B(h);OGATEB,P_SPINB(h),XR(H)::QAR(F)+B(C)
      • Refutation
        • P(c);XP(E)
    • Try
      • R(H);CHECK,XR(i)
      • Vars
        • B(h);P_SPINB(h),P_SPINP(g)::R1(B),XP(e)
      • Refutation
        • K(f);P_SPINP(e),S_FLIGHT,XR(H)
    • Try
      • R(H);CHECK
      • Vars
        • B(h);OGATE,P_SPINB(h),P_SPINP(g)::QAR1(F),XP(g)
      • Refutation
        • R(i);P_SPINR(i)
    • Try
      • R(H);CHECK
      • Vars
        • B(h);OGATE,P_SPINB(h),P_SPINP(g)::QAR1(F),XP(g)
      • Refutation
        • R(i);P_SPINR(i)
    • Try
      • R(H);CHECK
      • Vars
        • B(h);OGATE,P_SPINB(h),P_SPINP(g)::QAR1(F),XP(g)
      • Refutation
        • R(i);P_SPINR(i)
  • Actual
    • Q(F);
    • Threat
      • QAR(F)+S(I),DCHECK
    • Vars
      • R(i);N_GUARD,P_SPINR(i),XR(H)::QAR(F)+S(I),XP(g)
      • R(i);N_GUARD::R1(B),XP(e)
      • P(e);SBLOCK::S(A)
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Developed and maintained by Brian Stephenson.
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