MESON Chess Problem Database

Problem Display
PID: 101686 (q7/1b2R3/5p2/2P1p3/2BBkpP1/3p1N1n/6QK/8 w - - 0 1)

Spiess, Jean-Yves

diagrammes, 1990

q7/1b2R3/5p2/2P1p3/2BBkpP1/3p1N1n/6QK/8

#2

8 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...d2
      • 2.Qe2#
    • 1...f5
      • 2.Rxe5#
  • Tries
    • 1.Bf2?
      • threat
        • 2.Sd2#
        • 2.Sg5#
      • 1...Sg5
        • 2.Sd2#
        • 2.Sxg5#
      • 1...d2
        • 2.Sxd2#
        • 2.Sg5#
      • 1...Sxf2!
    • 1.Rd7?
      • threat
        • 2.Sd2#
        • 2.Sg5#
      • 1...exd4
        • 2.Re7#
      • 1...Sg5
        • 2.Sd2#
        • 2.Sxg5#
      • 1...d2
        • 2.Sxd2#
        • 2.Sg5#
        • 2.Qe2#
      • 1...Bd5!
  • Keys
    • 1.Qb2!
      • threat
        • 2.Sd2#
      • 1...Kxf3
        • 2.Qg2#
      • 1...Qa5
        • 2.Qxb7#
      • 1...d2
        • 2.Sxd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • P(a);N_GUARD::QAR2(A)
    • P(f);N_GUARD::R1(H),XP(e)
  • Tries
    • Try
      • B(E);
      • Threat
        • DUALS(2)
      • Refutation
        • S(b);XB(E)
    • Try
      • R(H);N_PINP(e)
      • Threat
        • DUALS(2)
      • Vars
        • P(e);OGATEB,XB(E)::R(H)
      • Refutation
        • B(g);
  • Actual
    • Q(A);
    • Threat
      • S(C)
    • Vars
      • K(c);N_SPINP(e),OGATEB,S_FLIGHT,XS(C)::QAB1(A)
      • Q(h);N_GUARD::QAB(A),XB(g)
      • P(a);::S(C),XP(a)
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