MESON Chess Problem Database

Problem Display
PID: 77240 (8/5p2/5pk1/3Q2NR/7K/8/8/8 w - - 0 1)

Pape, Edouard

2nd HM., L'Echiquier Marseillais, 1926

8/5p2/5pk1/3Q2NR/7K/8/8/8

#2

4 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Kg7
      • 2.Qxf7#
    • 1...fxg5+
      • 2.Qxg5#
    • 1...f5
      • 2.Qxf7#
  • Tries
    • 1.Kg3?
      • 1...Kg7
        • 2.Qxf7#
      • 1...fxg5
        • 2.Qxg5#
      • 1...f5
        • 2.Qxf7#
      • 1...Kxh5!
    • 1.Kh3?
      • 1...Kg7
        • 2.Qxf7#
      • 1...fxg5
        • 2.Qxg5#
      • 1...f5
        • 2.Qxf7#
      • 1...Kxh5!
    • 1.Kg4?
      • threat
        • 2.Qxf7#
      • 1...Kg7
        • 2.Qxf7#
      • 1...fxg5
        • 2.Qxg5#
      • 1...f5+!
    • 1.Se6?
      • threat
        • 2.Qg2#
        • 2.Qf5#
      • 1...f5
        • 2.Qxf5#
      • 1...fxe6!
    • 1.Rh7?
      • 1...f5
        • 2.Qxf7#
      • 1...fxg5+!
    • 1.Rh8?
      • 1...fxg5+
        • 2.Qxg5#
      • 1...f5
        • 2.Qxf7#
      • 1...Kg7!
    • 1.Qc4?
      • 1...Kf5
        • 2.Qe4#
      • 1...Kg7
        • 2.Qxf7#
      • 1...f5
        • 2.Qxf7#
      • 1...fxg5+!
    • 1.Qc6?
      • 1...Kf5
        • 2.Qe4#
      • 1...Kg7!
    • 1.Qe6?
      • 1...Kg7
        • 2.Qxf7#
      • 1...fxe6!
    • 1.Qb7?
      • 1...Kf5
        • 2.Qe4#
      • 1...Kg7
        • 2.Qxf7#
      • 1...f5
        • 2.Qxf7#
      • 1...fxg5+!
    • 1.Qd7?
      • 1...Kg7
        • 2.Qxf7#
      • 1...f5
        • 2.Qxf7#
      • 1...fxg5+!
  • Keys
    • 1.Qg2!
      • threat
        • 2.Sf3#
        • 2.Sh3#
        • 2.Se4#
        • 2.Se6#
        • 2.Sh7#
      • 1...fxg5+
        • 2.Qxg5#
      • 1...Kf5
        • 2.Qe4#
      • 1...Kg7
        • 2.Se6#
      • 1...f5
        • 2.Se4#
        • 2.Sh7#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • K(b);P-FLIGHT::QAR1(B),XP(c)
    • P(a);CHECK,OGATE,XS(C)::QAR1(B),XP(a)
    • P(a);::QAB1(B),XP(c)
  • Tries
    • Try
      • K(A);S_FLIGHT
      • Vars
        • K(b);P-FLIGHT::QAR1(B),XP(c)
        • P(a);OGATE,XS(C)::QAR1(B),XP(a)
        • P(a);::QAB1(B),XP(c)
      • Refutation
        • K(b);S_FLIGHT,XR(D)
    • Try
      • K(A);P-FLIGHT
      • Vars
        • K(b);P-FLIGHT::QAR1(B),XP(c)
        • P(a);OGATE,XS(C)::QAR1(B),XP(a)
        • P(a);::QAB1(B),XP(c)
      • Refutation
        • K(b);S_FLIGHT,XR(D)
    • Try
      • K(A);P-FLIGHT
      • Threat
        • QAB1(B),XP(c)
      • Vars
        • K(b);P-FLIGHT::QAR1(B),XP(c)
        • P(a);OGATE,XS(C)::QAR1(B),XP(a)
      • Refutation
        • P(a);CHECK
    • Try
      • S(C);
      • Threat
        • DUALS(2)
      • Vars
        • P(a);::QAB1(B),XP(a)
      • Refutation
        • P(c);XS(C)
    • Try
      • R(D);
      • Vars
        • P(a);::QAB1(B),XP(c)
      • Refutation
        • P(a);CHECK,XS(C)
    • Try
      • R(D);
      • Vars
        • P(a);CHECK,OGATE,XS(C)::QAR1(B),XP(a)
        • P(a);::QAB1(B),XP(c)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(B);
      • Vars
        • K(b);S_FLIGHT::QAB1(B)
        • K(b);P-FLIGHT::QAR1(B),XP(c)
        • P(a);::QAB1(B),XP(c)
      • Refutation
        • P(a);CHECK,XS(C)
    • Try
      • Q(B);P_PINP(a)
      • Vars
        • K(b);N_SPINP(a),S_FLIGHT::QAB1(B)
      • Refutation
        • K(b);N_SPINP(a),P-FLIGHT
    • Try
      • Q(B);P_PINP(a)
      • Vars
        • K(b);N_SPINP(a),P-FLIGHT::QAR1(B),XP(c)
      • Refutation
        • P(c);N_SPINP(a),XQ(B)
    • Try
      • Q(B);
      • Vars
        • K(b);S_FLIGHT::QAB1(B)
        • K(b);P-FLIGHT,P_SPINP(c)::QAR1(B),XP(c)
        • P(a);::QAB1(B),XP(c)
      • Refutation
        • P(a);CHECK,XS(C)
    • Try
      • Q(B);
      • Vars
        • K(b);P-FLIGHT,P_SPINP(c)::QAR1(B),XP(c)
        • P(a);::QAB1(B),XP(c)
      • Refutation
        • P(a);CHECK,XS(C)
  • Actual
    • Q(B);
    • Threat
      • DUALS(5)
    • Vars
      • P(a);CHECK,OGATE,P_SPINP(a),XS(C)::QAR1(B),XP(a)
      • K(b);S_FLIGHT::QAB1(B)
      • K(b);P-FLIGHT::QAR(B)+S(C),DCHECK
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