MESON Chess Problem Database

Problem Display
PID: 261323 (8/1Pbp1p2/6n1/1RN1kNQn/7P/8/1K6/8 w - - 0 1)

Guttman, Newman

Neue Zurcher Zeitung, 1986

8/1Pbp1p2/6n1/1RN1kNQn/7P/8/1K6/8

#2

7 + 6

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Tries
    • 1.Sb3+?
      • 1...Ke4
        • 2.Qe3#
      • 1...Ke6
        • 2.Sbd4#
      • 1...d5!
    • 1.Sd3+?
      • 1...Ke4
        • 2.Qe3#
      • 1...Ke6!
    • 1.Se4+?
      • 1...Kxe4
        • 2.Qe3#
      • 1...Ke6
        • 2.Sd4#
      • 1...d5!
    • 1.Sa6+?
      • 1...Ke4
        • 2.Qe3#
      • 1...Ke6
        • 2.Sxc7#
      • 1...d5!
    • 1.Sxd7+?
      • 1...Ke4
        • 2.Qe3#
      • 1...Ke6!
    • 1.Sd4+?
      • 1...Kxd4
        • 2.Rb4#
      • 1...Kd6
        • 2.Se4#
      • 1...f5!
    • 1.Qe7+?
      • 1...Kf4
        • 2.Qe4#
      • 1...Kd5
        • 2.Qe4#
      • 1...Kxf5
        • 2.Qg5#
      • 1...Sxe7!
  • Keys
    • 1.Qe3+!
      • 1...Kd5
        • 2.Qe4#
      • 1...Kxf5
        • 2.Qg5#
      • 1...Kf6
        • 2.Sxd7#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • K(a);N_GUARD,P-FLIGHT::QAR1(F)
        • K(a);N_GUARD,P-FLIGHT,S_CUTP(e)::S(D)
      • Refutation
        • P(e);P_SPINP(e)
    • Try
      • S(D);CHECK
      • Vars
        • K(a);N_GUARD,P-FLIGHT::QAR1(F)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • S(D);CHECK
      • Vars
        • K(a);N_GUARD,P-FLIGHT,S_CUTP(e),XS(D)::QAR1(F)
        • K(a);N_GUARD,P-FLIGHT::S(E)
      • Refutation
        • P(e);P_SPINP(e)
    • Try
      • S(D);CHECK
      • Vars
        • K(a);N_GUARD,P-FLIGHT::QAR1(F)
        • K(a);N_GUARD,P-FLIGHT,S_CUTP(e)::S(D),XB(d)
      • Refutation
        • P(e);P_SPINP(e)
    • Try
      • S(D);CHECK,XP(e)
      • Vars
        • K(a);P-FLIGHT::QAR1(F)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • S(E);CHECK
      • Vars
        • K(a);N_GUARD,S_CUTP(f),S_FLIGHT,XS(E)::R(C)
        • K(a);N_GUARD,S_FLIGHT::S(D)
      • Refutation
        • P(f);P_SPINP(f)
    • Try
      • Q(F);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAR1(F)
        • K(a);OGATE,P-FLIGHT::QAB1(F)
        • K(a);OGATEB,P-FLIGHT,XS(E)::QAR1(F)
      • Refutation
        • S(c);XQ(F)
  • Actual
    • Q(F);CHECK
    • Vars
      • K(a);N_GUARD,P-FLIGHT::QAB1(F)
      • K(a);OGATEB,P-FLIGHT,XS(E)::QAR1(F)
      • K(a);S_FLIGHT::S(D),XP(e)
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