MESON Chess Problem Database

Problem Display
PID: 257250 (4R3/1b4Q1/4NP2/1r1NB3/1b4p1/5k2/5P2/3R2K1 w - - 0 1)

Doukhan, Gerard

Loustau, Jean-Marc

Phenix, 2020

4R3/1b4Q1/4NP2/1r1NB3/1b4p1/5k2/5P2/3R2K1

#2

9 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Ke2
      • 2.Qxg4#
  • Tries
    • 1.Bd6?
      • threat
        • 2.Sd4#
        • 2.Sg5#
      • 1...Ke2
        • 2.Qxg4#
      • 1...Ke4
        • 2.Qxg4#
      • 1...Bd2
        • 2.Sd4#
      • 1...Bc3
        • 2.Sg5#
      • 1...Bc5
        • 2.Sg5#
      • 1...g3
        • 2.Sd4#
      • 1...Rxd5!
    • 1.Re1?
      • threat
        • 2.Sd4#
        • 2.Sg5#
        • 2.Re3#
      • 1...Rxd5
        • 2.Sg5#
        • 2.Re3#
      • 1...Bd2
        • 2.Sd4#
      • 1...Bc3
        • 2.Sg5#
        • 2.Re3#
      • 1...Bc5
        • 2.Sg5#
      • 1...g3
        • 2.Sd4#
        • 2.Re3#
        • 2.Qxg3#
      • 1...Bxe1!
    • 1.Rd4?
      • threat
        • 2.Qxg4#
      • 1...g3
        • 2.Qg4#
      • 1...Ke2!
    • 1.Rg8?
      • threat
        • 2.Qxg4#
      • 1...Ke2
        • 2.Qxg4#
      • 1...g3
        • 2.Qg4#
      • 1...Ke4!
  • Keys
    • 1.Se3!
      • threat
        • 2.Qxg4#
      • 1...Ke2
        • 2.Sd4#
      • 1...Ke4
        • 2.Sg5#
      • 1...g3
        • 2.Qg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(a);N_GUARD,S_FLIGHT::QAB(H),XP(c)
  • Tries
    • Try
      • B(E);
      • Threat
        • DUALS(2)
      • Vars
        • K(a);N_GUARD,S_FLIGHT::QAB(H),XP(c)
        • K(a);N_GUARD,S_FLIGHT::QAR2(H),XP(c)
        • B(b);::S(F)
        • B(b);P_PINP(C)::S(F)
        • P(c);::S(F)
      • Refutation
        • R(d);XS(D)
    • Try
      • R(A);
      • Threat
        • DUALS(3)
      • Vars
        • B(b);::S(F)
        • B(b);P_PINP(C)::S(F)
      • Refutation
        • B(b);XR(A)
    • Try
      • R(A);
      • Threat
        • QAB1(H),XP(c)
      • Vars
        • P(c);::QAB1(H)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(I);
      • Threat
        • QAB1(H),XP(c)
      • Vars
        • K(a);S_FLIGHT::QAB(H),XP(c)
        • P(c);::QAB1(H)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • S(D);
    • Threat
      • QAB1(H),XP(c)
    • Vars
      • K(a);N_GUARD,S_FLIGHT::S(F)
      • P(c);::QAB1(H)
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