MESON Chess Problem Database

Problem Display
PID: 172243 (8/8/8/2Q1b3/4k1K1/3pN3/8/8 w - - 0 1)

Andreev, Aleksandr Grigorevich

Kubanski krai, 1996

8/8/8/2Q1b3/4k1K1/3pN3/8/8

#2

3 + 3

6490 yacpdb 2018
5454 Near Snap 2022

SOLUTION

  • SOUND
  • Tries
    • 1.Sf5?
      • threat
        • 2.Qc6#
      • 1...Bf4
        • 2.Qd4#
      • 1...Ba1
        • 2.Sg3#
        • 2.Sd6#
      • 1...Bb2
        • 2.Sg3#
        • 2.Sd6#
      • 1...Bh2
        • 2.Qd4#
      • 1...Bc3
        • 2.Sg3#
        • 2.Sd6#
      • 1...Bg3
        • 2.Sxg3#
        • 2.Qd4#
      • 1...Bd4
        • 2.Qxd4#
      • 1...Bd6
        • 2.Sxd6#
        • 2.Qd4#
      • 1...Bf6
        • 2.Sg3#
        • 2.Sd6#
      • 1...Bc7
        • 2.Qd4#
      • 1...Bg7
        • 2.Sg3#
        • 2.Sd6#
      • 1...Bb8
        • 2.Qd4#
      • 1...Bh8
        • 2.Sg3#
        • 2.Sd6#
      • 1...d2!
    • 1.Qc6+?
      • 1...Kd4
        • 2.Sf5#
      • 1...Kxe3!
  • Keys
    • 1.Sd1!
      • threat
        • 2.Sf2#
      • 1...Bg3
        • 2.Sc3#
      • 1...Bd4
        • 2.Qf5#

This anticipates 170426(2012)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(A);
      • Threat
        • QAB(C)
      • Vars
        • B(c);N_GUARD::QAR1(C)
        • B(c);N_GUARD::QAR1(C),XB(c)
      • Refutation
        • P(a);
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);P-FLIGHT::S(A)
      • Refutation
        • K(b);P-FLIGHT,XS(A)
  • Actual
    • S(A);
    • Threat
      • S(A)
    • Vars
      • B(c);N_GUARD::S(A)
      • B(c);OGATE,SBLOCK::QAB1(C)
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