MESON Chess Problem Database

Problem Display
PID: 270384 (N4N2/6QB/3P1P1p/4k2P/2P5/4p2K/1P4p1/6B1 w - - 0 1)

Burenko, N

Shakhmatnaya kompozitsiya, 1997

N4N2/6QB/3P1P1p/4k2P/2P5/4p2K/1P4p1/6B1

#2

11 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Kf4
      • 2.Qg3#
    • 1...Kxd6
      • 2.Qc7#
  • Tries
    • 1.Kg3?
      • 1...Kxd6
        • 2.Qc7#
      • 1...e2
        • 2.Qe7#
      • 1...Kd4!
    • 1.Kg4?
      • 1...Kxd6
        • 2.Qc7#
      • 1...e2
        • 2.Qe7#
      • 1...Kd4!
    • 1.Sd7+?
      • 1...Kd4
        • 2.Qg4#
      • 1...Kf4
        • 2.Qg3#
        • 2.Qg4#
      • 1...Ke6
        • 2.Qe7#
      • 1...Kxd6!
    • 1.Bxe3?
      • threat
        • 2.Qe7#
      • 1...Kxd6
        • 2.Qc7#
      • 1...g1S+!
    • 1.Qg5+?
      • 1...Kd4
        • 2.Qd5#
      • 1...Kxd6
        • 2.Qd5#
      • 1...hxg5!
    • 1.Qe7+?
      • 1...Kf4
        • 2.Qxe3#
      • 1...Kd4!
    • 1.Qg8?
      • 1...Kd4
        • 2.Qd5#
      • 1...Kf4
        • 2.Qg3#
      • 1...Kxd6
        • 2.Qd5#
      • 1...Kxf6
        • 2.Sd7#
      • 1...e2!
    • 1.f7+?
      • 1...Kf4
        • 2.Qf6#
        • 2.Qg3#
      • 1...Kxd6!
  • Keys
    • 1.Qa7!
      • 1...Kf4
        • 2.Qxe3#
      • 1...Kxd6
        • 2.Qc7#
      • 1...Kxf6
        • 2.Qe7#
      • 1...e2
        • 2.Qd4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(c);N_GUARD,S_FLIGHT::QAB1(H)
    • K(c);OGATEB,S_FLIGHT,XP(F)::QAB1(H)
  • Tries
    • Try
      • K(C);P-FLIGHT
      • Vars
        • K(c);OGATEB,S_FLIGHT,XP(F)::QAB1(H)
        • P(b);::QAR2(H)
      • Refutation
        • K(c);P_SPINP(b),S_FLIGHT
    • Try
      • K(C);S_FLIGHT
      • Vars
        • K(c);OGATEB,S_FLIGHT,XP(F)::QAB1(H)
        • P(b);::QAR2(H)
      • Refutation
        • K(c);P_SPINP(b),S_FLIGHT
    • Try
      • S(K);CHECK
      • Vars
        • K(c);N_GUARD,P_SPINP(b),S_FLIGHT::QAR(H)
        • K(c);N_GUARD,P-FLIGHT::QAR1(H)
      • Refutation
        • K(c);S_FLIGHT,XP(F)
    • Try
      • B(A);XP(b)
      • Threat
        • QAR2(H)
      • Vars
        • K(c);OGATEB,S_FLIGHT,XP(F)::QAB1(H)
      • Refutation
        • P(a);CHECK
    • Try
      • Q(H);CHECK
      • Vars
        • K(c);OGATE,P_SPINP(b),S_FLIGHT::QAR1(H)
        • K(c);OGATE,S_FLIGHT,XP(F)::QAR1(H)
      • Refutation
        • P(d);XQ(H)
    • Try
      • Q(H);CHECK
      • Vars
        • K(c);OGATE,S_FLIGHT::QAB1(H),XP(b)
      • Refutation
        • K(c);P_SPINP(b),S_FLIGHT
    • Try
      • Q(H);
      • Vars
        • K(c);N_GUARD,P_SPINP(b),S_FLIGHT::QAR1(H)
        • K(c);N_GUARD,S_FLIGHT::QAB1(H)
        • K(c);N_GUARD,S_FLIGHT,XP(F)::QAR1(H)
        • K(c);N_GUARD,S_FLIGHT,XP(G)::S(K)
      • Refutation
        • P(b);
    • Try
      • P(G);CHECK
      • Refutation
        • K(c);S_FLIGHT,XP(F)
  • Actual
    • Q(H);
    • Vars
      • K(c);N_GUARD,S_FLIGHT::QAB1(H),XP(b)
      • K(c);OGATEB,S_FLIGHT,XP(F)::QAB1(H)
      • K(c);N_GUARD,S_FLIGHT,XP(G)::QAB1(H)
      • P(b);::QAB1(H)
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