MESON Chess Problem Database

Problem Display
PID: 250033 (qN6/kpQ5/3p4/3K4/8/8/8/8 w - - 0 1)

Szasz, Lajos

Magyar Sakkvilag, 1927

qN6/kpQ5/3p4/3K4/8/8/8/8

#2

3 + 4

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qxb8
      • 2.Qa5#
  • Tries
    • 1.Kc4?
      • 1...Qxb8
        • 2.Qa5#
      • 1...d5+!
    • 1.Kd4?
      • 1...Qxb8
        • 2.Qa5#
      • 1...d5!
    • 1.Ke4?
      • 1...Qxb8
        • 2.Qa5#
      • 1...d5+!
    • 1.Ke6?
      • 1...Qxb8
        • 2.Qa5#
      • 1...d5!
  • Keys
    • 1.Sc6+!
      • 1...Ka6
        • 2.Qa5#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • Q(d);SBLOCK,XS(C)::QAR2(B)
  • Tries
    • Try
      • K(A);S_FLIGHT
      • Vars
        • Q(d);SBLOCK,XS(C)::QAR2(B)
      • Refutation
        • P(a);CHECK
    • Try
      • K(A);P-FLIGHT
      • Vars
        • Q(d);SBLOCK,XS(C)::QAR2(B)
      • Refutation
        • P(a);
    • Try
      • K(A);S_FLIGHT
      • Vars
        • Q(d);SBLOCK,XS(C)::QAR2(B)
      • Refutation
        • P(a);CHECK
    • Try
      • K(A);S_FLIGHT
      • Vars
        • Q(d);SBLOCK,XS(C)::QAR2(B)
      • Refutation
        • P(a);
  • Actual
    • S(C);CHECK
    • Vars
      • K(b);N_SPINP(c),P-FLIGHT::QAR1(B)
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