MESON Chess Problem Database

Problem Display
PID: 75922 (1nR5/nkNP4/R7/1P6/4K3/3Q4/8/8 w - - 0 1)

Joffart, Daniel

Prize, Probleme-Supplement, 1969

1nR5/nkNP4/R7/1P6/4K3/3Q4/8/8

#2

7 + 3

274 diagrammes 1974
3713 Snap 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Sxb5
      • 2.Qxb5#
  • Tries
    • 1.Se6?
      • 1...Ka8
        • 2.Qd5#
      • 1...Sxb5
        • 2.Sc5#
        • 2.Qxb5#
      • 1...Sxc8
        • 2.d8S#
      • 1...Sxd7
        • 2.Qxd7#
      • 1...Sac6
        • 2.Sc5#
        • 2.Rc7#
      • 1...Sbc6
        • 2.Sc5#
      • 1...Sxa6!
    • 1.Se8?
      • 1...Ka8
        • 2.Qd5#
      • 1...Sxb5
        • 2.Qxb5#
      • 1...Sxc8
        • 2.d8S#
      • 1...Sxd7
        • 2.Sd6#
        • 2.Qxd7#
      • 1...Sac6
        • 2.Sd6#
        • 2.Rc7#
      • 1...Sbc6
        • 2.Sd6#
      • 1...Sxa6!
    • 1.Rxa7+?
      • 1...Kb6
        • 2.Qe3#
        • 2.Qd4#
      • 1...Kxa7!
    • 1.Rxb8+?
      • 1...Kxc7
        • 2.Qd6#
        • 2.d8Q#
      • 1...Kxb8!
  • Keys
    • 1.Sa8!
      • 1...Kxa8
        • 2.Qd5#
      • 1...Sxb5
        • 2.Qxb5#
      • 1...Sxc8
        • 2.d8S#
      • 1...Sxa6
        • 2.bxa6#
      • 1...Sxd7
        • 2.Qxd7#
      • 1...Sac6
        • 2.Rc7#
      • 1...Sbc6
        • 2.Rb6#

Anticipated by 269867(1940)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • S(a);OGATE,XP(C)::QAR2(A),XS(a)
  • Tries
    • Try
      • S(E);
      • Vars
        • K(b);P_SPINS(a),S_FLIGHT::QAB(A)
        • S(a);SBLOCK,XR(G)::P=S
        • S(c);OGATE,XP(F)::QAR2(A),XS(c)
        • S(c);::S(E)
      • Refutation
        • S(c);XR(D)
    • Try
      • S(E);
      • Vars
        • K(b);P_SPINS(a),S_FLIGHT::QAB(A)
        • S(a);OGATE,XP(C)::QAR2(A),XS(a)
        • S(a);SBLOCK,XR(G)::P=S
        • S(c);::S(E)
      • Refutation
        • S(c);XR(D)
    • Try
      • R(D);CHECK,XS(a)
      • Refutation
        • K(b);P-FLIGHT,XR(D)
    • Try
      • R(G);CHECK,XS(c)
      • Refutation
        • K(b);P-FLIGHT,XR(G)
  • Actual
    • S(E);
    • Vars
      • K(b);P_SPINS(a),S_FLIGHT,XS(E)::QAB(A)
      • S(a);OGATE,XP(C)::QAR2(A),XS(a)
      • S(a);SBLOCK,XR(G)::P=S
      • S(c);OGATE,XR(D)::P(C),XS(c)
      • S(c);OGATE,XP(F)::QAR2(A),XS(c)
      • S(a);::R1(G)
      • S(c);::R1(D)
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