MESON Chess Problem Database

Problem Display
PID: 160161 (8/nN6/2n5/5Q2/kp6/8/1K6/8 w - - 0 1)

Andreev, Aleksandr Grigorevich

Bankovskaya gazeta, 1996

8/nN6/2n5/5Q2/kp6/8/1K6/8

#2

3 + 4

15148 Sadier Collection 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Sd4
      • 2.Qa5#
    • 1...Sa5
      • 2.Qxa5#
    • 1...Se7
      • 2.Qa5#
    • 1...Sb8
      • 2.Qa5#
    • 1...Sd8
      • 2.Qa5#
  • Tries
    • 1.Qc2+?
      • 1...b3
        • 2.Qxb3#
      • 1...Kb5!
  • Keys
    • 1.Qd5!
      • 1...b3
        • 2.Qxb3#
      • 1...Sd4
        • 2.Qa5#
      • 1...Sa5
        • 2.Qxa5#
      • 1...Se5
        • 2.Qa5#
      • 1...Se7
        • 2.Qa5#
      • 1...Sb8
        • 2.Qa5#
      • 1...Sd8
        • 2.Qa5#
      • 1...Sb5
        • 2.Qb3#
      • 1...Sc8
        • 2.Qxc6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • S(c);N_GUARD::QAR1(B)
    • S(c);N_GUARD::QAR1(B),XS(c)
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • P(b);P_SPINP(b)::QAB1(B),XP(b)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(B);
    • Vars
      • P(b);::QAB1(B),XP(b)
      • S(c);N_GUARD::QAR1(B)
      • S(c);N_GUARD::QAR1(B),XS(c)
      • S(d);SBLOCK::QAB1(B)
      • S(d);N_GUARD::QAB(B),XS(c)
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