MESON Chess Problem Database

Problem Display
PID: 183250 (8/1p6/1kP5/1N4R1/K7/8/8/1Q6 w - - 0 1)

Grassano, Carlos A

Kudesnik, 2018

8/1p6/1kP5/1N4R1/K7/8/8/1Q6

#2

5 + 2

SOLUTION

  • SOUND
  • Tries
    • 1.Sd4+?
      • 1...Ka6
        • 2.Ra5#
        • 2.Qxb7#
      • 1...Ka7
        • 2.Qxb7#
      • 1...Kc7!
    • 1.Sa7+?
      • 1...Ka6
        • 2.Ra5#
        • 2.Qxb7#
      • 1...Kxa7
        • 2.Qxb7#
      • 1...Kc7!
    • 1.Qe1?
      • 1...Ka6
        • 2.Qa5#
      • 1...Kxc6
        • 2.Qe6#
      • 1...bxc6!
    • 1.Qg1+?
      • 1...Ka6
        • 2.Sc7#
        • 2.Qa7#
      • 1...Kxc6!
    • 1.Qb4?
      • 1...Ka6
        • 2.Qa5#
      • 1...Kxc6
        • 2.Qd6#
      • 1...bxc6!
  • Keys
    • 1.Qh7!
      • threat
        • 2.Qxb7#
      • 1...Ka6
        • 2.Qxb7#
      • 1...Kxc6
        • 2.Qc7#
      • 1...bxc6
        • 2.Qa7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAR1(A),XP(b)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(C);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT,XS(C)::QAR1(A),XP(b)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(a);P-FLIGHT::QAR1(A)
        • K(a);OGATEB,P-FLIGHT,XP(E)::QAR2(A)
      • Refutation
        • P(b);XP(E)
    • Try
      • Q(A);CHECK
      • Refutation
        • K(a);P-FLIGHT,XP(E)
    • Try
      • Q(A);
      • Vars
        • K(a);P-FLIGHT::QAR1(A)
        • K(a);OGATEB,P-FLIGHT,XP(E)::QAR1(A)
      • Refutation
        • P(b);XP(E)
  • Actual
    • Q(A);
    • Threat
      • QAR1(A),XP(b)
    • Vars
      • K(a);P-FLIGHT::QAB1(A),XP(b)
      • K(a);P-FLIGHT,XP(E)::QAR1(A)
      • P(b);OGATE,SBLOCK,XP(E)::QAB1(A)
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