MESON Chess Problem Database

Problem Display
PID: 245274 (5bq1/B7/K2p1p2/5p2/ppk2p1r/1p1R4/8/3Q1b2 w - - 0 1)

Kisis, Imants J

64 Shakhmatnoe obozrenie, 1978

5bq1/B7/K2p1p2/5p2/ppk2p1r/1p1R4/8/3Q1b2

#2

4 + 12

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...b2
      • 2.Qc2#
    • 1...a3
      • 2.Qxb3#
  • Tries
    • 1.Rc3+?
      • 1...bxc3
        • 2.Qd4#
      • 1...Kxc3+!
    • 1.Rf3?
      • threat
        • 2.Qd4#
      • 1...Bd3
        • 2.Qxd3#
      • 1...Qd5
        • 2.Qc1#
      • 1...Qg1!
  • Keys
    • 1.Qf3!
      • threat
        • 2.Rd4#
      • 1...Bxd3
        • 2.Qc6#
      • 1...Qd5
        • 2.Qxd5#
      • 1...Qg1
        • 2.Qd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • P(b);N_GUARD::QAR2(A)
    • P(c);N_GUARD::QAB1(A),XP(b)
  • Tries
    • Try
      • R(B);CHECK
      • Vars
        • P(d);XR(B)::QAR1(A)
      • Refutation
        • K(e);CHECK,P-FLIGHT,XR(B)
    • Try
      • R(B);
      • Threat
        • QAR1(A)
      • Vars
        • B(a);N_GUARD::QAB1(A),XB(a)
        • Q(l);SBLOCK::QAR(A)
      • Refutation
        • Q(l);
  • Actual
    • Q(A);
    • Threat
      • R1(B)
    • Vars
      • B(a);SBLOCK,XR(B)::QAR2(A)
      • Q(l);N_GUARD::QAB1(A),XQ(l)
      • Q(l);N_GUARD::QAB1(A)
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