MESON Chess Problem Database

Problem Display
PID: 172216 (8/8/8/8/8/3pQ3/6PK/3r1kN1 w - - 0 1)

Andreev, Aleksandr Grigorevich

Kuban segodniya, 1996

8/8/8/8/8/3pQ3/6PK/3r1kN1

#2

4 + 3

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Re1
      • 2.Qf4#
      • 2.Qf3#
    • 1...d2
      • 2.Qe2#
  • Tries
    • 1.Sf3?
      • 1...Ra1
        • 2.Sd2#
      • 1...Rb1
        • 2.Sd2#
      • 1...Rc1
        • 2.Sd2#
      • 1...Re1
        • 2.Sd2#
        • 2.Qxe1#
      • 1...Rd2
        • 2.Sxd2#
        • 2.Qe1#
      • 1...d2!
    • 1.Qxd3+?
      • 1...Ke1
        • 2.Qe2#
      • 1...Kf2
        • 2.Qe2#
      • 1...Rxd3!
  • Keys
    • 1.Se2!
      • threat
        • 2.Sg3#
      • 1...Ke1
        • 2.Sg3#
      • 1...dxe2
        • 2.Qg1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • P(c);N_GUARD::QAB1(D)
  • Tries
    • Try
      • S(A);
      • Vars
        • R(a);N_GUARD::S(A)
      • Refutation
        • P(c);
    • Try
      • Q(D);CHECK,XP(c)
      • Vars
        • K(b);P-FLIGHT::QAR1(D)
      • Refutation
        • R(a);XQ(D)
  • Actual
    • S(A);
    • Threat
      • S(A)
    • Vars
      • K(b);P-FLIGHT::QAR(D)+S(A)
      • P(c);SBLOCK,XS(A)::QAR1(D)
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