MESON Chess Problem Database

Problem Display
PID: 142871 (5QK1/2bB2Bp/3n4/2Pk4/N1p2pNq/2p5/1rP1R3/8 w - - 0 1)

Dubernat, R

1/2 HM., La Cle 05. Beginners' Ty., 1971

5QK1/2bB2Bp/3n4/2Pk4/N1p2pNq/2p5/1rP1R3/8

#2

9 + 9

274 diagrammes 1973

SOLUTION

  • SOUND
  • Sets
    • 1...Ba5
      • 2.Qxd6#
    • 1...Bb6
      • 2.Qxd6#
    • 1...Bd8
      • 2.Qxd6#
    • 1...Se4
      • 2.Qf7#
    • 1...Sb5
      • 2.Qf7#
      • 2.Qa8#
    • 1...Sf5
      • 2.Sxc3#
      • 2.Qf7#
    • 1...Sb7
      • 2.Sxc3#
      • 2.Qf7#
    • 1...Sf7
      • 2.Sxc3#
      • 2.Qxf7#
    • 1...Sc8
      • 2.Sxc3#
      • 2.Qf7#
    • 1...Se8
      • 2.Sxc3#
      • 2.Qf7#
  • Tries
    • 1.Se3+?
      • 1...Ke4
        • 2.Bc6#
      • 1...fxe3!
    • 1.Rd2+?
      • 1...Ke4
        • 2.Bc6#
      • 1...cxd2!
  • Keys
    • 1.Re4!
      • threat
        • 2.Rd4#
      • 1...Kxe4
        • 2.Bc6#
      • 1...Sxe4
        • 2.Qf7#
      • 1...Qf2
        • 2.Sf6#
      • 1...Qf6
        • 2.Sxf6#
      • 1...Sb5
        • 2.Qa8#
      • 1...Sf5
        • 2.Sxc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 3
  • Sets
    • B(h);N_GUARD::QAR1(H),XS(g)
    • S(g);N_GUARD::QAB(H)
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • K(f);S_FLIGHT::B(F)
      • Refutation
        • P(d);XS(D)
    • Try
      • R(B);CHECK
      • Vars
        • K(f);S_FLIGHT::B(F)
      • Refutation
        • P(b);XR(B)
  • Actual
    • R(B);
    • Threat
      • R1(B)
    • Vars
      • K(f);S_FLIGHT,XR(B)::B(F)
      • S(g);N_GUARD,SBLOCK,XR(B)::QAB(H)
      • Q(e);N_GUARD::S(D)
      • Q(e);N_GUARD::S(D),XQ(e)
      • S(g);N_GUARD,S_CUTR(a)::QAB(H)
      • S(g);::S(C),XP(b)
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