MESON Chess Problem Database

Problem Display
PID: 138795 (bqQr1B2/b2P4/2n5/1n1kP1RN/1P1N2R1/5P2/3KP3/5B1r w - - 0 1)

Retter, Yosef

3rd Prize, Hirschenson JT, 2010

bqQr1B2/b2P4/2n5/1n1kP1RN/1P1N2R1/5P2/3KP3/5B1r

#2

13 + 8

145 StrateGems 2010

SOLUTION

  • SOUND
  • Sets
    • 1...Sxb4
      • 2.Sf6#
    • 1...Sxd4
      • 2.Sf4#
    • 1...Sa5
      • 2.Sf6#
    • 1...Sxe5
      • 2.Sf6#
    • 1...Se7
      • 2.Sf6#
  • Tries
    • 1.Sf4+?
      • 1...Kxd4
        • 2.e3#
      • 1...Kc4!
  • Keys
    • 1.Qa6!
      • threat
        • 2.Qa2#
      • 1...Kc4
        • 2.Qa2#
      • 1...Sbxd4
        • 2.Sf4#
      • 1...Sxb4
        • 2.Qe6#
      • 1...Scxd4
        • 2.e4#
      • 1...Sa3
        • 2.Sf6#
      • 1...Sc3
        • 2.Sf6#
      • 1...Sd6
        • 2.Sf6#
      • 1...Sa5
        • 2.Qe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 5
    • REMOVED MATES = 2
  • Sets
    • S(d);XP(E)::S(J)
    • S(d);SBLOCK,XS(F)::S(J)
    • S(d);::S(J)
    • S(d);P_SPINS(d),XP(H)::S(J)
  • Tries
    • Try
      • S(J);CHECK
      • Vars
        • K(c);P-FLIGHT,XS(F)::P(C)
      • Refutation
        • K(c);P_SPINS(d),S_FLIGHT
  • Actual
    • Q(L);
    • Threat
      • QAB(L)
    • Vars
      • K(c);P_SPINS(b),S_FLIGHT::QAB(L)
      • S(b);SBLOCK,XS(F)::S(J)
      • S(d);OGATE,XP(E)::QAB1(L)
      • S(d);SBLOCK,XS(F)::P(C)
      • S(b);::S(J)
      • S(d);OGATE::QAB1(L)
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