MESON Chess Problem Database

Problem Display
PID: 152919 (8/4K3/1p6/3kBB2/8/2Q5/8/6n1 w - - 0 1)

Alekseev, Yuri Mikhailovich

Shakhmatnaya kompozitsiya, 2005

8/4K3/1p6/3kBB2/8/2Q5/8/6n1

#2

4 + 3

15148 Sadier Collection 2014
5454 Near Snap 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Bg4?
      • 1...Ke4
        • 2.Qd4#
      • 1...Se2
        • 2.Bf3#
      • 1...Sf3
        • 2.Bxf3#
      • 1...Sh3
        • 2.Bf3#
      • 1...b5!
    • 1.Bd7?
      • threat
        • 2.Bc6#
        • 2.Qd4#
      • 1...Se2
        • 2.Bc6#
      • 1...Sf3
        • 2.Bc6#
      • 1...Ke4!
    • 1.Qc4+?
      • 1...Kxe5
        • 2.Qe4#
      • 1...Kxc4!
    • 1.Qc6+?
      • 1...Kxe5
        • 2.Qe4#
      • 1...Kxc6!
  • Keys
    • 1.Qb4!
      • threat
        • 2.Qb5#
      • 1...Kxe5
        • 2.Qe4#
      • 1...Kc6
        • 2.Be4#
      • 1...b5
        • 2.Qxb5#

Anticipated by 177757(1988)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(C);
      • Vars
        • K(b);S_FLIGHT::QAR1(A)
        • S(a);N_GUARD::B(C)
        • S(a);N_GUARD::B(C),XS(a)
      • Refutation
        • P(c);
    • Try
      • B(C);
      • Threat
        • DUALS(2)
      • Vars
        • S(a);::B(C)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);P-FLIGHT,XB(B)::QAR1(A)
      • Refutation
        • K(b);S_FLIGHT,XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);OGATE,P-FLIGHT,XB(B)::QAR1(A)
      • Refutation
        • K(b);S_FLIGHT,XQ(A)
  • Actual
    • Q(A);
    • Threat
      • QAR2(A)
    • Vars
      • K(b);P-FLIGHT,XB(B)::QAR1(A)
      • K(b);S_FLIGHT::B(C)
      • P(c);::QAR2(A),XP(c)
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