MESON Chess Problem Database

Problem Display
PID: 206606 (8/8/8/8/8/3Q2p1/3p2K1/3kN3 w - - 0 1)

Schonberger, Tibor

Magyar Sakkvilag, 1925

8/8/8/8/8/3Q2p1/3p2K1/3kN3

#2

3 + 3

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kc1
      • 2.Qc2#
    • 1...Kxe1
      • 2.Qf1#
  • Tries
    • 1.Kf1?
      • threat
        • 2.Qb1#
        • 2.Qc2#
      • 1...Kc1
        • 2.Qc2#
      • 1...g2+!
    • 1.Kg1?
      • 1...Kc1
        • 2.Qc2#
      • 1...Kxe1
        • 2.Qf1#
      • 1...g2!
    • 1.Kxg3?
      • 1...Kc1
        • 2.Qc2#
      • 1...Kxe1!
    • 1.Qf3+?
      • 1...Kxe1
        • 2.Qf1#
      • 1...Kc1!
  • Keys
    • 1.Kf3!
      • threat
        • 2.Qb1#
      • 1...Kc1
        • 2.Qc2#
      • 1...Kxe1
        • 2.Qe2#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • K(a);N_SPINP(b),P-FLIGHT::QAR1(C)
    • K(a);N_SPINP(b),OGATEB,P-FLIGHT,XS(A)::QAR1(C)
  • Tries
    • Try
      • K(B);S_FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • K(a);N_SPINP(b),P-FLIGHT::QAR1(C)
      • Refutation
        • P(c);CHECK
    • Try
      • K(B);P-FLIGHT
      • Vars
        • K(a);N_SPINP(b),P-FLIGHT::QAR1(C)
        • K(a);N_SPINP(b),OGATEB,P-FLIGHT,XS(A)::QAR1(C)
      • Refutation
        • P(c);
    • Try
      • K(B);P-FLIGHT,XP(c)
      • Vars
        • K(a);N_SPINP(b),P-FLIGHT::QAR1(C)
      • Refutation
        • K(a);N_SPINP(b),P-FLIGHT,XS(A)
    • Try
      • Q(C);CHECK,N_PINP(b)
      • Vars
        • K(a);OGATEB,P-FLIGHT,XS(A)::QAR1(C)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • K(B);S_FLIGHT
    • Threat
      • QAR2(C)
    • Vars
      • K(a);N_SPINP(b),P-FLIGHT::QAR1(C)
      • K(a);N_SPINP(b),P-FLIGHT,XS(A)::QAR1(C)
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