MESON Chess Problem Database

Problem Display
PID: 172310 (8/8/8/K2b4/4N3/k3r3/8/1Q6 w - - 0 1)

Andreev, Aleksandr Grigorevich

Vecherni Krasnodar, 1996

8/8/8/K2b4/4N3/k3r3/8/1Q6

#2

3 + 3

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Rb3
      • 2.Qa1#
    • 1...Ba2
      • 2.Qb4#
  • Tries
    • 1.Sc3?
      • threat
        • 2.Sb5#
        • 2.Qb4#
      • 1...Re4
        • 2.Sb5#
      • 1...Bb3
        • 2.Sb5#
        • 2.Qc1#
      • 1...Bc4
        • 2.Qb4#
      • 1...Bc6
        • 2.Qa2#
        • 2.Qb4#
      • 1...Rxc3!
  • Keys
    • 1.Sd6!
      • threat
        • 2.Sb5#
      • 1...Rb3
        • 2.Qa1#
      • 1...Bc4
        • 2.Sxc4#
      • 1...Bc6
        • 2.Sc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • R(b);SBLOCK,S_CUTB(c)::QAR2(A)
    • B(c);SBLOCK::QAB1(A)
  • Tries
    • Try
      • S(B);
      • Threat
        • DUALS(2)
      • Vars
        • R(b);::S(B)
        • B(c);::QAB1(A)
      • Refutation
        • R(b);XS(B)
  • Actual
    • S(B);
    • Threat
      • S(B)
    • Vars
      • R(b);SBLOCK,S_CUTB(c)::QAR2(A)
      • B(c);N_GUARD::S(B),XB(c)
      • B(c);N_GUARD::S(B)
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