MESON Chess Problem Database

Problem Display
PID: 23754 (8/8/1K6/3p4/2k5/3p4/R7/4B2Q w - - 0 1)

di Vincenzi, Renato

Unpublished, 1996

8/8/1K6/3p4/2k5/3p4/R7/4B2Q

#2

4 + 3

5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kb3
      • 2.Qxd5#
  • Tries
    • 1.Qe4+?
      • 1...Kb3
        • 2.Qxd5#
        • 2.Qa4#
      • 1...d4
        • 2.Qe6#
      • 1...dxe4!
    • 1.Qf1?
      • 1...Kd4
        • 2.Qf4#
      • 1...d4
        • 2.Qf7#
      • 1...Kb3!
    • 1.Qh4+?
      • 1...Kb3
        • 2.Qa4#
      • 1...d4!
  • Keys
    • 1.Qf3!
      • 1...Kb3
        • 2.Qxd5#
      • 1...Kd4
        • 2.Qf4#
      • 1...d2
        • 2.Ra4#
      • 1...d4
        • 2.Qf7#

Anticipated by 219121(1966)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(b);S_FLIGHT::QAB(B),XP(c)
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • P(c);OGATEB,P_SPINP(c),SBLOCK::QAB(B)
      • Refutation
        • P(c);XQ(B)
    • Try
      • Q(B);P_PINP(a)
      • Vars
        • K(b);N_SPINP(a),P-FLIGHT::QAR2(B)
        • P(c);OGATEB,SBLOCK::QAB(B)
      • Refutation
        • K(b);N_SPINP(a),S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT::QAB1(B)
      • Refutation
        • P(c);P_SPINP(c)
  • Actual
    • Q(B);
    • Vars
      • K(b);P_SPINP(a),S_FLIGHT::QAB(B),XP(c)
      • K(b);P-FLIGHT::QAR2(B)
      • P(a);::R(C)
      • P(c);OGATEB,SBLOCK::QAB(B)
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