MESON Chess Problem Database

Problem Display
PID: 266898 (r4b2/pQp5/1p1p4/1kP2N1R/8/1PP1N3/R1n4K/8 w - - 0 1)

Murashev, Pavel Aleksandrovich

Shakhmatnaya kompozitsiya, 2022

r4b2/pQp5/1p1p4/1kP2N1R/8/1PP1N3/R1n4K/8

#2

9 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Kxc5
      • 2.Qd5#
    • 1...Sa1
      • 2.Sd4#
    • 1...Se1
      • 2.Sd4#
    • 1...Sxe3
      • 2.Sd4#
    • 1...Sb4
      • 2.Sd4#
    • 1...Sd4
      • 2.Sxd4#
  • Tries
    • 1.Sc4?
      • threat
        • 2.Ra5#
      • 1...Kxc5
        • 2.Sfxd6#
      • 1...Sa3
        • 2.Sd4#
      • 1...a5!
    • 1.Sxd6+?
      • 1...cxd6
        • 2.Qd7#
        • 2.cxd6#
      • 1...Bxd6+!
    • 1.Qa6+?
      • 1...Kxc5
        • 2.Qc4#
      • 1...Kc6!
    • 1.cxb6?
      • threat
        • 2.Sd4#
        • 2.Sxd6#
      • 1...Kc5
        • 2.Ra5#
      • 1...Sd4
        • 2.Sxd4#
        • 2.Sxd6#
      • 1...c5
        • 2.bxa7#
      • 1...d5!
  • Keys
    • 1.cxd6!
      • threat
        • 2.Sd4#
      • 1...Bxd6+
        • 2.Sxd6#
      • 1...Kc5
        • 2.Qd5#
      • 1...Sd4
        • 2.Sxd4#
      • 1...c5
        • 2.Qd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • K(b);N_SPINP(c),OGATEB,P-FLIGHT,XP(F)::QAR1(I)
    • S(a);N_GUARD::S(G)
    • S(a);N_GUARD,XS(E)::S(G)
    • S(a);N_GUARD::S(G),XS(a)
  • Tries
    • Try
      • S(E);
      • Threat
        • R1(A)
      • Vars
        • K(b);N_SPINP(c),P-FLIGHT,S_CUTB(h),S_CUTP(f),XP(F)::R(H)+S(G),XP(d)
        • S(a);N_GUARD::S(G)
      • Refutation
        • P(e);
    • Try
      • S(G);CHECK,XP(d)
      • Refutation
        • B(h);CHECK,XS(G)
    • Try
      • Q(I);CHECK,N_PINP(c)
      • Vars
        • K(b);OGATE,P-FLIGHT,XP(F)::QAR1(I)
      • Refutation
        • K(b);P_SPINP(c),S_FLIGHT
    • Try
      • P(F);XP(c)
      • Threat
        • DUALS(2)
      • Vars
        • K(b);N_GUARD,P-FLIGHT::R(A)
        • P(f);SBLOCK::QAR(I)+P(F),XP(e)
      • Refutation
        • P(d);
  • Actual
    • P(F);XP(d)
    • Threat
      • R(H)+S(G),DCHECK
    • Vars
      • B(h);CHECK,XP(F)::R(H)+S(G),DCHECK,XB(h)
      • K(b);N_SPINP(c),P-FLIGHT,S_CUTP(f)::QAR1(I)
      • S(a);::R(H)+S(G),DCHECK,XS(a)
      • P(f);OGATE,SBLOCK::QAB(I)
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