MESON Chess Problem Database

Problem Display
PID: 233319 (8/8/4B3/8/4kp2/1N2p3/4Q3/7K w - - 0 1)

Neyndorff, Luke

Chess Life, 1982

8/8/4B3/8/4kp2/1N2p3/4Q3/7K

#2

4 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Qd1?
      • threat
        • 2.Qd5#
      • 1...e2
        • 2.Qxe2#
      • 1...f3
        • 2.Qd4#
      • 1...Ke5!
    • 1.Qb5?
      • threat
        • 2.Qd5#
      • 1...e2
        • 2.Qxe2#
      • 1...f3
        • 2.Qf5#
      • 1...Kf3!
    • 1.Qh5?
      • threat
        • 2.Qd5#
      • 1...e2
        • 2.Qxe2#
      • 1...f3
        • 2.Qf5#
      • 1...Kd3!
    • 1.Qc2+?
      • 1...Kf3
        • 2.Qg2#
      • 1...Ke5!
  • Keys
    • 1.Qb2!
      • 1...Kd3
        • 2.Sc5#
      • 1...Kf3
        • 2.Qg2#
      • 1...e2
        • 2.Qxe2#
      • 1...f3
        • 2.Qd4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(B);N_PINP(a)
      • Threat
        • QAB1(B)
      • Vars
        • P(a);OGATEB::QAR2(B),XP(a)
        • P(c);SBLOCK::QAR1(B)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(B);N_PINP(a)
      • Threat
        • QAB1(B)
      • Vars
        • P(a);OGATEB::QAR2(B),XP(a)
        • P(c);::QAB1(B)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(B);N_PINP(a)
      • Threat
        • QAB1(B)
      • Vars
        • P(a);OGATEB::QAR2(B),XP(a)
        • P(c);::QAB1(B)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(B);CHECK,N_PINP(a)
      • Vars
        • K(b);S_FLIGHT::QAB1(B)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • Q(B);N_PINP(a)
    • Vars
      • K(b);S_FLIGHT::S(C)
      • K(b);S_FLIGHT::QAB1(B)
      • P(a);OGATEB::QAR2(B),XP(a)
      • P(c);SBLOCK::QAR1(B)
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