MESON Chess Problem Database

Problem Display
PID: 238670 (8/5R2/1Kp1P1p1/QN1pk1B1/4P2R/8/8/8 w - - 0 1)

Agostini, Valerio

idee & form, 2009

8/5R2/1Kp1P1p1/QN1pk1B1/4P2R/8/8/8

#2

8 + 4

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe6
      • 2.Re7#
  • Tries
    • 1.Kxc6?
      • 1...Kxe6
        • 2.Re7#
      • 1...d4
        • 2.Sc7#
      • 1...dxe4!
    • 1.Qd2?
      • 1...Kxe6
        • 2.Re7#
      • 1...dxe4
        • 2.Qd6#
      • 1...cxb5
        • 2.Qxd5#
      • 1...c5
        • 2.Qxd5#
      • 1...d4!
    • 1.Qc3+?
      • 1...Kxe6
        • 2.Re7#
        • 2.Qf6#
      • 1...d4!
    • 1.Qa1+?
      • 1...Kxe6
        • 2.Re7#
        • 2.Qf6#
      • 1...d4!
  • Keys
    • 1.Qa2!
      • 1...Kxe6
        • 2.Re7#
      • 1...dxe4
        • 2.Bf4#
      • 1...cxb5
        • 2.Qxd5#
      • 1...c5
        • 2.Qxd5#
      • 1...d4
        • 2.Bf6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • K(b);OGATEB,P-FLIGHT,XP(G)::R1(H)
  • Tries
    • Try
      • K(F);P-FLIGHT,XP(c)
      • Vars
        • K(b);OGATEB,P-FLIGHT,XP(G)::R1(H)
        • P(a);SBLOCK::QAR(C)+S(D)
      • Refutation
        • P(a);XP(A)
    • Try
      • Q(C);
      • Vars
        • K(b);OGATEB,P-FLIGHT,XP(G)::R1(H)
        • P(a);OGATE,XP(A)::QAB1(C)
        • P(c);N_GUARD,XS(D)::QAR1(C),XP(a)
        • P(c);N_GUARD::QAR1(C),XP(a)
      • Refutation
        • P(a);
    • Try
      • Q(C);CHECK
      • Refutation
        • P(a);P_SPINP(a)
    • Try
      • Q(C);CHECK
      • Refutation
        • P(a);P_SPINP(a)
  • Actual
    • Q(C);
    • Vars
      • K(b);OGATEB,P-FLIGHT,P_SPINP(a),XP(G)::R1(H)
      • P(a);SBLOCK,XP(A)::B(E)
      • P(c);N_GUARD,XS(D)::QAR1(C),XP(a)
      • P(c);N_GUARD::QAR1(C),XP(a)
      • P(a);::B(E)
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