MESON Chess Problem Database

Problem Display
PID: 172540 (8/8/8/8/2pp4/K1k5/2bN1Q2/8 w - - 0 1)

Andreev, Aleksandr Grigorevich

Kuban segodniya, 2003

8/8/8/8/2pp4/K1k5/2bN1Q2/8

#2

3 + 4

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...d3
      • 2.Se4#
  • Tries
    • 1.Sb1+?
      • 1...Kd3
        • 2.Qf3#
      • 1...Bxb1!
    • 1.Sf3?
      • threat
        • 2.Qxd4#
        • 2.Qd2#
      • 1...Bb1
        • 2.Qd2#
      • 1...Bd1
        • 2.Qd2#
      • 1...Bb3
        • 2.Qd2#
      • 1...Bd3
        • 2.Qb2#
        • 2.Qd2#
      • 1...Ba4
        • 2.Qd2#
      • 1...Be4
        • 2.Qd2#
      • 1...Bf5
        • 2.Qd2#
      • 1...Bg6
        • 2.Qd2#
      • 1...Bh7
        • 2.Qd2#
      • 1...d3
        • 2.Qd4#
        • 2.Qd2#
      • 1...Kd3!
    • 1.Se4+?
      • 1...Kd3
        • 2.Qf3#
      • 1...Bxe4!
  • Keys
    • 1.Sf1!
      • threat
        • 2.Qd2#
      • 1...Kd3
        • 2.Qf3#
      • 1...d3
        • 2.Qf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • P(d);SBLOCK,S_CUTB(a)::S(A)
  • Tries
    • Try
      • S(A);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR2(B)
      • Refutation
        • B(a);XS(A)
    • Try
      • S(A);
      • Threat
        • DUALS(2)
      • Vars
        • B(a);::QAB1(B)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • S(A);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR2(B)
      • Refutation
        • B(a);XS(A)
  • Actual
    • S(A);
    • Threat
      • QAB1(B)
    • Vars
      • K(b);P-FLIGHT::QAR2(B)
      • P(d);OGATEB,SBLOCK::QAB(B)
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