MESON Chess Problem Database

Problem Display
PID: 142587 (8/8/1N2p1K1/1pP1k1P1/1R1n1pQ1/8/4P3/8 w - - 0 1)

di Scala, Pascal

Phenix, 1990

8/8/1N2p1K1/1pP1k1P1/1R1n1pQ1/8/4P3/8

#2

7 + 5

5454 Near Snap 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.Qxe6#
    • 1...Sc2
      • 2.Qxf4#
    • 1...Sxe2
      • 2.Qxe2#
    • 1...Sb3
      • 2.Qxf4#
    • 1...Sf3
      • 2.Qxf4#
    • 1...Sf5
      • 2.Qxf4#
    • 1...Sc6
      • 2.Qxf4#
    • 1...f3
      • 2.Qxd4#
  • Tries
    • 1.Kf7?
      • 1...Ke4
        • 2.Qxe6#
      • 1...Sxe2
        • 2.Qxe6#
      • 1...Sc2
        • 2.Qxe6#
        • 2.Qxf4#
      • 1...Sb3
        • 2.Qxe6#
        • 2.Qxf4#
      • 1...Sf3
        • 2.Qxe6#
        • 2.Qxf4#
      • 1...Sf5
        • 2.Qxf4#
      • 1...Sc6
        • 2.Qxe6#
        • 2.Qxf4#
      • 1...f3!
    • 1.Sd7+?
      • 1...Ke4
        • 2.Qf3#
        • 2.Qxe6#
      • 1...Kd5!
    • 1.Rxd4?
      • threat
        • 2.Qxf4#
      • 1...f3
        • 2.Sd7#
        • 2.Re4#
        • 2.Qe4#
        • 2.Qf4#
      • 1...Kxd4!
    • 1.Qh4?
      • 1...Sxe2
        • 2.Qh8#
      • 1...f3
        • 2.Qxd4#
      • 1...Sc2
        • 2.Qxf4#
        • 2.Qh8#
      • 1...Sb3
        • 2.Qxf4#
        • 2.Qh8#
      • 1...Sf3
        • 2.Qxf4#
        • 2.Qh8#
      • 1...Sf5
        • 2.Qxf4#
      • 1...Sc6
        • 2.Qxf4#
        • 2.Qh8#
      • 1...Ke4!
  • Keys
    • 1.e4!
      • 1...Kxe4
        • 2.Qe2#
      • 1...fxe4 ep
        • 2.Qxd4#
      • 1...f3
        • 2.Sd7#
      • 1...Sc2
        • 2.Sd7#
      • 1...Se2
        • 2.Sd7#
      • 1...Sb3
        • 2.Sd7#
      • 1...Sf3
        • 2.Sd7#
      • 1...Sf5
        • 2.Sd7#
      • 1...Sc6
        • 2.Sd7#

Anticipated by 18224(1954)

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 8
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(d);P-FLIGHT,P_SPINP(b),P_SPINS(a)::QAR2(C),XP(e)
    • S(a);::QAB1(C),XP(b)
    • S(a);OGATE,XP(A)::QAR(C),XS(a)
    • P(b);OGATE::QAB1(C),XS(a)
  • Tries
    • Try
      • K(G);S_FLIGHT
      • Vars
        • K(d);P-FLIGHT,P_SPINP(b),P_SPINS(a)::QAR2(C),XP(e)
        • S(a);N_GUARD,XP(A)::QAR1(C),XP(e)
        • S(a);::QAB1(C),XP(b)
      • Refutation
        • P(b);
    • Try
      • S(F);CHECK
      • Refutation
        • K(d);P-FLIGHT
    • Try
      • R(B);XS(a)
      • Threat
        • QAB1(C),XP(b)
      • Refutation
        • K(d);P_SPINP(b),S_FLIGHT,XR(B)
    • Try
      • Q(C);
      • Vars
        • S(a);XP(A)::QAB(C)
        • P(b);OGATE::QAB1(C),XS(a)
        • S(a);::QAB1(C),XP(b)
      • Refutation
        • K(d);P-FLIGHT,P_SPINP(b),P_SPINS(a)
  • Actual
    • P(A);
    • Vars
      • K(d);OGATEB,P-FLIGHT,P_SPINP(b),P_SPINS(a),XP(A)::QAR2(C)
      • P(b);EP,OGATE,XP(A)::QAB1(C),XS(a)
      • P(b);::S(F)
      • S(a);::S(F)
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