MESON Chess Problem Database

Problem Display
PID: 183251 (2Nk4/2pp4/6K1/8/4Q3/7B/8/8 w - - 0 1)

Grassano, Carlos A

Kudesnik, 2018

2Nk4/2pp4/6K1/8/4Q3/7B/8/8

#2

4 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Kxc8
      • 2.Qa8#
    • 1...d5
      • 2.Qe7#
    • 1...d6
      • 2.Qe7#
  • Tries
    • 1.Qd4?
      • threat
        • 2.Qh8#
        • 2.Qxd7#
      • 1...Ke8
        • 2.Qh8#
      • 1...c5
        • 2.Qxd7#
      • 1...c6
        • 2.Qxd7#
      • 1...d5
        • 2.Qh8#
      • 1...d6
        • 2.Qh8#
      • 1...Kxc8!
    • 1.Qh4+?
      • 1...Ke8
        • 2.Qe7#
        • 2.Qh8#
      • 1...Kxc8!
  • Keys
    • 1.Qd5!
      • threat
        • 2.Qg8#
        • 2.Qxd7#
      • 1...Kxc8
        • 2.Qa8#
      • 1...Ke8
        • 2.Qg8#
      • 1...c5
        • 2.Qxd7#
      • 1...c6
        • 2.Qxd7#
      • 1...d6
        • 2.Qg8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • K(c);OGATEB,P-FLIGHT,P_SPINP(b),XS(D)::QAR2(B)
    • P(b);::QAB1(B)
  • Tries
    • Try
      • Q(B);P_PINP(b)
      • Threat
        • DUALS(2)
      • Vars
        • K(c);N_SPINP(b),P-FLIGHT::QAR(B)
        • P(a);::QAR1(B),XP(b)
        • P(b);::QAR(B)
      • Refutation
        • K(c);P-FLIGHT,XS(D)
    • Try
      • Q(B);CHECK
      • Refutation
        • K(c);P-FLIGHT,P_SPINP(b),XS(D)
  • Actual
    • Q(B);P_PINP(b)
    • Threat
      • DUALS(2)
    • Vars
      • K(c);OGATEB,P-FLIGHT,XS(D)::QAR2(B)
      • K(c);N_SPINP(b),P-FLIGHT::QAR2(B)
      • P(a);::QAR1(B),XP(b)
      • P(b);::QAR(B)
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