MESON Chess Problem Database

Problem Display
PID: 62536 (8/8/6Q1/N4r2/1PPkPb2/5P2/2K2P2/8 w - - 0 1)

Bourd, Evgeny

Phenix, 2002

8/8/6Q1/N4r2/1PPkPb2/5P2/2K2P2/8

#2

8 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Ke5
      • 2.Sc6#
    • 1...Be5
      • 2.Qb6#
  • Tries
    • 1.Qxf5?
      • threat
        • 2.Qc5#
        • 2.Qd5#
      • 1...Bd6
        • 2.Qd5#
      • 1...Be5!
    • 1.Qb6+?
      • 1...Rc5
        • 2.Qxc5#
      • 1...Ke5!
    • 1.Qd6+?
      • 1...Rd5
        • 2.Qxd5#
      • 1...Bxd6!
    • 1.Qe6?
      • threat
        • 2.Sb3#
        • 2.Sc6#
      • 1...Rc5
        • 2.Sb3#
      • 1...Rd5
        • 2.Qxd5#
      • 1...Rxa5!
  • Keys
    • 1.e5!
      • threat
        • 2.Qd6#
      • 1...Kxe5
        • 2.Sc6#
      • 1...Rxe5
        • 2.Qd3#
      • 1...Bxe5
        • 2.Qb6#
      • 1...Rf6
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::S(G)
    • B(b);SBLOCK,S_CUTR(c)::QAB(H)
  • Tries
    • Try
      • Q(H);XR(c)
      • Threat
        • DUALS(2)
      • Vars
        • B(b);::QAR1(H)
      • Refutation
        • B(b);
    • Try
      • Q(H);CHECK
      • Vars
        • R(c);N_GUARD,P_PINP(E),P_SPINR(c)::QAB1(H),XR(c)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(H);CHECK
      • Vars
        • R(c);N_GUARD,P_SPINR(c)::QAR1(H),XR(c)
      • Refutation
        • B(b);XQ(H)
    • Try
      • Q(H);
      • Threat
        • DUALS(2)
      • Vars
        • R(c);P_PINP(E)::S(G)
        • R(c);N_GUARD::QAR1(H),XR(c)
      • Refutation
        • R(c);XS(G)
  • Actual
    • P(F);
    • Threat
      • QAR2(H)
    • Vars
      • K(a);S_FLIGHT,XP(F)::S(G)
      • R(c);OGATE,SBLOCK,XP(F)::QAR1(H)
      • B(b);SBLOCK,XP(F)::QAB(H)
      • R(c);OGATE::QAR1(H)
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