MESON Chess Problem Database

Problem Display
PID: 142086 (8/3R4/2PR2n1/p3k1Pp/p4qP1/2K2BB1/p3P1n1/Qb6 w - - 0 1)

Etmishev, Eduard Artemevich

Phenix, 1989

8/3R4/2PR2n1/p3k1Pp/p4qP1/2K2BB1/p3P1n1/Qb6

#2

10 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Bc2
      • 2.Kxc2#
    • 1...Bd3
      • 2.Kxd3#
    • 1...Be4
      • 2.Kc4#
    • 1...Se3
      • 2.Kd2#
    • 1...a3
      • 2.Kb3#
  • Tries
    • 1.Bxf4+?
      • 1...S2xf4
        • 2.Kd2#
        • 2.Kc4#
      • 1...S6xf4
        • 2.Kd2#
        • 2.Kc4#
      • 1...Kxf4!
    • 1.e4?
      • threat
        • 2.Kc4#
      • 1...Bd3
        • 2.Kxd3#
      • 1...Se3
        • 2.Kd2#
      • 1...Qxg3!
  • Keys
    • 1.Rf6!
      • threat
        • 2.Rd5#
      • 1...Be4
        • 2.Kc4#
      • 1...Se3
        • 2.Kd2#
      • 1...Se7
        • 2.Rxe7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • B(a);::QAB(A)+K(C),XB(a)
    • B(a);::QAB(A)+K(C)
    • S(c);::QAB(A)+K(C)
    • P(d);::QAB(A)+K(C)
  • Tries
    • Try
      • B(E);CHECK,XQ(e)
      • Refutation
        • K(g);S_FLIGHT,XB(E)
    • Try
      • P(B);
      • Threat
        • QAB(A)+K(C)
      • Vars
        • B(a);::QAB(A)+K(C),XB(a)
        • S(c);::QAB(A)+K(C)
      • Refutation
        • Q(e);N_SPINQ(e),P_PINB(D),XB(E)
  • Actual
    • R(I);
    • Threat
      • R1(J)
    • Vars
      • B(a);::QAB(A)+K(C)
      • S(c);::QAB(A)+K(C)
      • S(i);N_GUARD::R(J),XS(i)
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