MESON Chess Problem Database

Problem Display
PID: 110537 (8/8/8/1B6/8/pk6/3Q4/2K5 w - - 0 1)

Jakab, Arpad

Chess Amateur (The), 1921

8/8/8/1B6/8/pk6/3Q4/2K5

#2

3 + 2

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...a2
      • 2.Qb2#
  • Tries
    • 1.Qc3+?
      • 1...Ka2
        • 2.Bc4#
      • 1...Kxc3!
    • 1.Qb4+?
      • 1...Ka2
        • 2.Qb1#
      • 1...Kxb4!
    • 1.Qe2?
      • threat
        • 2.Qc4#
      • 1...Kc3
        • 2.Qc4#
      • 1...a2
        • 2.Qb2#
      • 1...Kb4!
    • 1.Qd3+?
      • 1...Ka2
        • 2.Qb1#
      • 1...Kb4!
    • 1.Qd5+?
      • 1...Kc3
        • 2.Qc4#
      • 1...Kb4!
  • Keys
    • 1.Qd4!
      • threat
        • 2.Qc4#
      • 1...Ka2
        • 2.Bc4#
      • 1...a2
        • 2.Qb2#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • P(a);N_GUARD::QAR1(B)
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);S_FLIGHT::B(C)
      • Refutation
        • K(b);P-FLIGHT,XQ(B)
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT::QAB1(B)
      • Refutation
        • K(b);P-FLIGHT,XQ(B)
    • Try
      • Q(B);
      • Threat
        • QAB1(B)
      • Vars
        • K(b);P-FLIGHT::QAR1(B)
        • P(a);N_GUARD::QAR1(B)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);S_FLIGHT::QAB1(B)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(B)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • Q(B);
    • Threat
      • QAB1(B)
    • Vars
      • K(b);S_FLIGHT::B(C)
      • P(a);N_GUARD::QAR1(B)
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