MESON Chess Problem Database

Problem Display
PID: 206907 (2qb4/pp4R1/8/7k/1Q6/5PP1/8/1KB3r1 w - - 0 1)

Shastree, Trevangadacharya

Essays on Chess, 1814

2qb4/pp4R1/8/7k/1Q6/5PP1/8/1KB3r1

#2

6 + 6

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qg4
      • 2.Qxg4#
      • 2.fxg4#
    • 1...Qc3
      • 2.Qg4#
    • 1...Qc5
      • 2.Qg4#
    • 1...Qc6
      • 2.Qg4#
    • 1...Qc7
      • 2.Qg4#
    • 1...Qa8
      • 2.Qg4#
    • 1...Qb8
      • 2.Qg4#
    • 1...Bh4
      • 2.Qxh4#
    • 1...Ba5
      • 2.Qh4#
    • 1...Bb6
      • 2.Qh4#
    • 1...Bc7
      • 2.Qh4#
  • Tries
    • 1.Rg5+?
      • 1...Kh6
        • 2.Qh4#
      • 1...Bxg5!
    • 1.Qb5+?
      • 1...Qc5
        • 2.Qe8#
      • 1...Bg5
        • 2.Qxg5#
      • 1...Qf5+!
  • Keys
    • 1.Qg4+!
      • 1...Qxg4
        • 2.fxg4#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 10
  • Sets
    • Q(e);N_GUARD::QAB1(E)
    • B(f);N_GUARD::QAR1(E),XB(f)
    • B(f);N_GUARD,SBLOCK::QAR1(E)
    • B(f);N_GUARD::QAR1(E)
  • Tries
    • Try
      • R(F);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR2(E)
      • Refutation
        • B(f);XR(F)
    • Try
      • Q(E);CHECK
      • Vars
        • Q(e);P_SPINQ(e)::QAB(E)
        • B(f);N_GUARD,P_SPINB(f)::QAR1(E),XB(f)
      • Refutation
        • Q(e);CHECK,P_SPINQ(e)
  • Actual
    • Q(E);CHECK
    • Vars
      • Q(e);OGATE,XQ(E)::P(C),XQ(e)
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