MESON Chess Problem Database

Problem Display
PID: 267369 (8/6p1/3NpR1P/2P1k1p1/2P5/3p1Q2/3PpP1K/6B1 w - - 0 1)

Flekken, JP

van Sinttruijen, JJ

Schakend Nederland, 1979

8/6p1/3NpR1P/2P1k1p1/2P5/3p1Q2/3PpP1K/6B1

#2

10 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4
      • 2.Qe3#
    • 1...g4
      • 2.Qf4#
    • 1...gxf6
      • 2.Qe4#
      • 2.Qe3#
  • Tries
    • 1.Rf4?
      • threat
        • 2.Sf7#
        • 2.Re4#
        • 2.Qe4#
        • 2.Qe3#
      • 1...e1Q
        • 2.Sf7#
      • 1...e1R
        • 2.Sf7#
      • 1...gxf4!
    • 1.Rf5+?
      • 1...Kd4
        • 2.Qe4#
        • 2.Qg4#
        • 2.Qe3#
      • 1...exf5!
    • 1.Rxe6+?
      • 1...Kd4
        • 2.Qd5#
        • 2.Qe3#
      • 1...Kxe6!
    • 1.Qg4?
      • threat
        • 2.Rxe6#
      • 1...gxf6
        • 2.Sf7#
        • 2.Qe4#
      • 1...Kxf6!
    • 1.Qxd3?
      • threat
        • 2.Qc3#
      • 1...gxf6
        • 2.Qe4#
        • 2.Qe3#
      • 1...Kxf6!
    • 1.Qg3+?
      • 1...Kd4
        • 2.Qe3#
        • 2.f3#
        • 2.f4#
      • 1...Kxf6!
    • 1.Qf5+?
      • 1...Kd4
        • 2.f3#
        • 2.f4#
      • 1...exf5!
  • Keys
    • 1.Qb7!
      • threat
        • 2.Qb2#
      • 1...Kd4
        • 2.f4#
      • 1...Kxf6
        • 2.Qxg7#
      • 1...gxf6
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • K(c);N_GUARD,S_FLIGHT::QAB1(E)
    • P(d);N_GUARD::QAB1(E)
  • Tries
    • Try
      • R(I);
      • Threat
        • DUALS(4)
      • Vars
        • P(a);::S(H)
      • Refutation
        • P(d);XR(I)
    • Try
      • R(I);CHECK
      • Refutation
        • P(e);XR(I)
    • Try
      • R(I);CHECK,XP(e)
      • Refutation
        • K(c);P-FLIGHT,XR(I)
    • Try
      • Q(E);
      • Threat
        • R1(I),XP(e)
      • Refutation
        • K(c);S_FLIGHT,XR(I)
    • Try
      • Q(E);XP(b)
      • Threat
        • QAB(E)
      • Refutation
        • K(c);S_FLIGHT,XR(I)
    • Try
      • Q(E);CHECK
      • Refutation
        • K(c);S_FLIGHT,XR(I)
    • Try
      • Q(E);CHECK
      • Refutation
        • P(e);XQ(E)
  • Actual
    • Q(E);
    • Threat
      • QAB(E)
    • Vars
      • K(c);N_GUARD,S_CUTP(d),S_FLIGHT::B(A)+P(C)
      • K(c);OGATEB,S_FLIGHT,XR(I)::QAB1(E),XP(f)
      • P(f);SBLOCK,XR(I)::QAR1(E)
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