MESON Chess Problem Database

Problem Display
PID: 24460 (5QKn/2p3pN/2p5/2p2P1p/1pr1Pk1r/1P5p/2B2P1N/B7 w - - 0 1)

Casa, Alex

1st Prize, L'Echiquier de Paris, 1954

5QKn/2p3pN/2p5/2p2P1p/1pr1Pk1r/1P5p/2B2P1N/B7

#2

10 + 11

3105 FIDE Album (1945-1955) 1964
136 Problem Observer 2015

SOLUTION

  • SOUND
  • Sets
    • 1...Sg6
      • 2.fxg6#
  • Tries
    • 1.Qe7?
      • threat
        • 2.Be5#
        • 2.Qxh4#
        • 2.Qg5#
        • 2.Qe5#
        • 2.Qxc7#
      • 1...Rxc2
        • 2.Qxh4#
        • 2.Qe5#
      • 1...Rxe4
        • 2.Qg5#
        • 2.Qxe4#
      • 1...Rc3
        • 2.Qxc7#
      • 1...Rg4
        • 2.Be5#
        • 2.Qe5#
        • 2.Qxc7#
      • 1...Sg6
        • 2.Qg5#
      • 1...Sf7
        • 2.Qxh4#
      • 1...g5
        • 2.Be5#
        • 2.Qxg5#
        • 2.Qe5#
        • 2.Qxc7#
      • 1...Rd4!
    • 1.Qd8?
      • threat
        • 2.Qxh4#
        • 2.Qg5#
        • 2.Qxc7#
        • 2.Qd2#
      • 1...Rxc2
        • 2.Qxh4#
      • 1...Rxe4
        • 2.Qg5#
      • 1...Rc3
        • 2.Qxc7#
      • 1...Rg4
        • 2.Qxc7#
        • 2.Qd2#
      • 1...Sg6
        • 2.Qg5#
        • 2.Qd2#
      • 1...Sf7
        • 2.Qxh4#
        • 2.Qd2#
      • 1...g5
        • 2.Qxg5#
        • 2.Qxc7#
        • 2.Qd2#
      • 1...Rd4!
  • Keys
    • 1.Qxg7!
      • threat
        • 2.Be5#
        • 2.Qe5#
        • 2.Qh6#
        • 2.Qg3#
        • 2.Qg5#
        • 2.Qxc7#
      • 1...Rxc2
        • 2.Qe5#
      • 1...Rxe4
        • 2.Qg5#
      • 1...Rc3
        • 2.Qxc7#
      • 1...Rd4
        • 2.Qg3#
      • 1...Rg4
        • 2.Be5#
      • 1...Sg6
        • 2.Qh6#
      • 1...Sf7
        • 2.Qg3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • S(k);OGATE::QAR(I)+P(G),XS(k)
  • Tries
    • Try
      • Q(I);
      • Threat
        • DUALS(5)
      • Vars
        • R(c);::QAB(I),XP(i)
        • S(k);::QAB1(I)
        • S(k);::QAR2(I),XR(e)
      • Refutation
        • R(c);
    • Try
      • Q(I);
      • Threat
        • DUALS(4)
      • Vars
        • R(c);XB(B)::QAR2(I),XR(e)
        • R(c);XP(F)::QAB1(I)
        • R(c);::QAB(I),XP(i)
      • Refutation
        • R(c);
  • Actual
    • Q(I);XP(j)
    • Threat
      • DUALS(6)
    • Vars
      • R(c);XB(B)::QAB1(I)
      • R(c);XP(F)::QAB1(I)
      • R(c);::QAB(I),XP(i)
      • R(c);::QAB1(I)
      • R(e);P_PINQ(I)::B(A)
      • S(k);::QAB(I)
      • S(k);::QAB1(I)
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