MESON Chess Problem Database

Problem Display
PID: 200536 (b7/8/7Q/8/1n4K1/8/4P1k1/R7 w - - 0 1)

Libis, Zdenek

Sachova skladba, 2001

b7/8/7Q/8/1n4K1/8/4P1k1/R7

#2

4 + 3

3713 Snap 2019

SOLUTION

  • SOUND
  • Tries
    • 1.Qe3?
      • threat
        • 2.Qg1#
        • 2.Qg3#
      • 1...Kh2
        • 2.Qg1#
        • 2.Qg3#
        • 2.Qh3#
      • 1...Bf3+!
    • 1.Qb6?
      • threat
        • 2.Qg1#
      • 1...Kh2
        • 2.Qg1#
      • 1...Bf3+!
    • 1.e4?
      • threat
        • 2.Qd2#
      • 1...Kf2
        • 2.Qd2#
      • 1...Sd3!
  • Keys
    • 1.Qd2!
      • threat
        • 2.e3#
        • 2.e4#
      • 1...Bf3+
        • 2.exf3#
      • 1...Kf2
        • 2.e3#
        • 2.e4#
      • 1...Kh2
        • 2.e4#
      • 1...Be4
        • 2.e3#
      • 1...Sd3
        • 2.exd3#

Anticipated by 21044(1915)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(D);
      • Threat
        • DUALS(2)
      • Refutation
        • B(c);CHECK
    • Try
      • Q(D);
      • Threat
        • QAR1(D)
      • Vars
        • K(a);P-FLIGHT::QAB1(D)
      • Refutation
        • B(c);CHECK
    • Try
      • P(B);
      • Threat
        • QAR(D)
      • Vars
        • K(a);P-FLIGHT::QAR2(D)
      • Refutation
        • S(b);
  • Actual
    • Q(D);
    • Threat
      • DUALS(2)
    • Vars
      • B(c);CHECK,OGATE::QAR(D)+P(B),XB(c)
      • K(a);P-FLIGHT::QAR(D)+P(B)
      • B(c);::QAR(D)+P(B)
      • S(b);OGATE::QAR(D)+P(B),XS(b)
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