MESON Chess Problem Database

Problem Display
PID: 101684 (3n2Q1/4p3/2b2k1N/8/4pB1n/5P2/3N4/7K w - - 0 1)

Spiess, Jean-Yves

diagrammes, 1990

3n2Q1/4p3/2b2k1N/8/4pB1n/5P2/3N4/7K

#2

6 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Ba4
      • 2.Sxe4#
    • 1...Bb5
      • 2.Sxe4#
    • 1...Bd7
      • 2.Sxe4#
    • 1...Be8
      • 2.Sxe4#
    • 1...Sf5
      • 2.Sg4#
    • 1...Se6
      • 2.Qf7#
    • 1...Sb7
      • 2.Qf7#
    • 1...Sf7
      • 2.Qxf7#
    • 1...e5
      • 2.Bg5#
    • 1...e6
      • 2.Qg5#
  • Keys
    • 1.fxe4!
      • threat
        • 2.Sg4#
      • 1...Bxe4+
        • 2.Sxe4#
      • 1...Sf7
        • 2.Qxf7#
      • 1...e5
        • 2.Bg5#
      • 1...e6
        • 2.Qg5#
      • 1...Bd7
        • 2.e5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 6
  • Sets
    • B(c);N_GUARD::S(B),XP(a)
    • S(b);SBLOCK::S(E)
    • S(f);N_GUARD::QAR1(F)
    • S(f);N_GUARD::QAR1(F),XS(f)
    • P(e);SBLOCK::B(D)
    • P(e);SBLOCK::QAB1(F)
  • Actual
    • P(C);P_SPINP(C),XP(a)
    • Threat
      • S(E)
    • Vars
      • B(c);CHECK,XP(C)::S(B),XB(c)
      • S(f);N_GUARD::QAR1(F),XS(f)
      • P(e);SBLOCK::B(D)
      • P(e);SBLOCK::QAB1(F)
      • B(c);N_PINP(C)::P(C)
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