MESON Chess Problem Database

Problem Display
PID: 274475 (Q2N4/1NP5/3P4/R1P1p3/4Pn1R/3p1kpB/3p2p1/3K2B1 w - - 0 1)

Doukhan, Gerard

idee & form, 2021

Q2N4/1NP5/3P4/R1P1p3/4Pn1R/3p1kpB/3p2p1/3K2B1

#2

12 + 7

15601 Albrecht-Leiss-Degener Collection 2024

SOLUTION

  • SOUND
  • Tries
    • 1.Ra3?
      • 1...Kxe4
        • 2.Sa5#
      • 1...Sxh3
        • 2.Rxd3#
      • 1...Se2
        • 2.Rxd3#
      • 1...Sh5
        • 2.Rxd3#
      • 1...Se6
        • 2.Rxd3#
      • 1...Sg6
        • 2.Rxd3#
      • 1...Sd5!
    • 1.Qa6?
      • 1...Kxe4
        • 2.Qc6#
      • 1...Sxh3
        • 2.Qxd3#
      • 1...Se2
        • 2.Qxd3#
      • 1...Sh5
        • 2.Qxd3#
      • 1...Se6
        • 2.Qxd3#
      • 1...Sg6
        • 2.Qxd3#
      • 1...Sd5!
    • 1.Qc8?
      • 1...Kxe4
        • 2.Bxg2#
      • 1...Sxh3
        • 2.Qg4#
      • 1...Se2
        • 2.Qg4#
      • 1...Sd5
        • 2.Qg4#
      • 1...Sh5
        • 2.Qg4#
      • 1...Sg6
        • 2.Qg4#
      • 1...Se6!
    • 1.c8Q?
      • 1...Kxe4
        • 2.Bxg2#
        • 2.Qc6#
      • 1...Sxh3
        • 2.Qg4#
      • 1...Se2
        • 2.Qg4#
      • 1...Sd5
        • 2.Qg4#
      • 1...Sh5
        • 2.Qg4#
      • 1...Sg6
        • 2.Qg4#
      • 1...Se6!
  • Keys
    • 1.Sf7!
      • threat
        • 2.Sg5#
      • 1...Kxe4
        • 2.Sbd8#
      • 1...Sxh3
        • 2.Sxe5#
      • 1...Se6
        • 2.Sxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(F);P_PINP(c)
      • Vars
        • K(d);N_SPINP(c),P_SPINS(f),S_FLIGHT,XP(D)::QAB(K)+S(I)
        • S(f);N_GUARD,XB(C)::R(F),XP(c)
        • S(f);N_GUARD::R(F),XP(c)
      • Refutation
        • S(f);
    • Try
      • Q(K);
      • Vars
        • K(d);OGATEB,P_SPINS(f),S_FLIGHT,XP(D)::QAB(K)
        • S(f);N_GUARD,XB(C)::QAR2(K),XP(c)
        • S(f);N_GUARD::QAR2(K),XP(c)
      • Refutation
        • S(f);
    • Try
      • Q(K);
      • Vars
        • K(d);N_GUARD,P_SPINS(f),S_FLIGHT,XP(D)::B(C),XP(b)
        • S(f);XB(C)::QAB1(K)
        • S(f);::QAB1(K)
      • Refutation
        • S(f);
    • Try
      • P(J);
      • Vars
        • S(f);XB(C)::QAB1(J)
        • S(f);::QAB1(J)
      • Refutation
        • S(f);
  • Actual
    • S(L);
    • Threat
      • S(L)
    • Vars
      • K(d);P_SPINS(f),S_FLIGHT,XP(D)::QAB(K)+S(I)
      • S(f);XB(C)::S(L),XP(g)
      • S(f);::S(L),XP(g)
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