MESON Chess Problem Database

Problem Display
PID: 163367 (q7/8/pR4Q1/2pN4/2kpP1R1/1p6/1PP5/K4b2 w - - 0 1)

Antonov, Yuri Mikhailovich

Uralski Problemist, 1994

q7/8/pR4Q1/2pN4/2kpP1R1/1p6/1PP5/K4b2

#2

8 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Bd3
      • 2.cxb3#
  • Tries
    • 1.Rg3?
      • threat
        • 2.cxb3#
      • 1...bxc2
        • 2.b3#
      • 1...d3!
    • 1.Qf7?
      • threat
        • 2.Se3#
      • 1...Qxd5
        • 2.Qxd5#
      • 1...d3
        • 2.e5#
      • 1...bxc2!
    • 1.Qe6?
      • threat
        • 2.Se3#
      • 1...Qxd5
        • 2.Qxd5#
      • 1...d3
        • 2.e5#
      • 1...bxc2!
  • Keys
    • 1.e5!
      • threat
        • 2.Se3#
      • 1...Kxd5
        • 2.Qe6#
      • 1...Qxd5
        • 2.cxb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • B(a);SBLOCK::P(C),XP(b)
  • Tries
    • Try
      • R(E);
      • Threat
        • P(C),XP(b)
      • Vars
        • P(b);OGATE,XP(C)::P(B)
      • Refutation
        • P(d);
    • Try
      • Q(H);
      • Threat
        • QAB(H)+S(F),DCHECK
      • Vars
        • Q(g);OGATE,P_SPINQ(g),XS(F)::QAB1(H),XQ(g)
        • P(d);::R(E)+P(D)
      • Refutation
        • P(b);XP(C)
    • Try
      • Q(H);
      • Threat
        • QAB(H)+S(F),DCHECK
      • Vars
        • Q(g);OGATE,P_SPINQ(g),XS(F)::QAB1(H),XQ(g)
        • P(d);::R(E)+P(D)
      • Refutation
        • P(b);XP(C)
  • Actual
    • P(D);P_PINP(d)
    • Threat
      • S(F)
    • Vars
      • K(c);N_SPINP(d),OGATEB,S_FLIGHT,XS(F)::QAB1(H)
      • Q(g);SBLOCK,XS(F)::P(C),XP(b)
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