MESON Chess Problem Database

Problem Display
PID: 160026 (3Q4/8/8/8/8/KN6/2bRn3/1k6 w - - 0 1)

Andreev, Aleksandr Grigorevich

Bankovskaya gazeta, 1996

3Q4/8/8/8/8/KN6/2bRn3/1k6

#2

4 + 3

15148 Sadier Collection 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Bd1
      • 2.Rb2#
    • 1...Bd3
      • 2.Rb2#
      • 2.Qxd3#
    • 1...Be4
      • 2.Rb2#
    • 1...Bf5
      • 2.Rb2#
    • 1...Bg6
      • 2.Rb2#
    • 1...Bh7
      • 2.Rb2#
  • Tries
    • 1.Rd1+?
      • 1...Sc1
        • 2.Rxc1#
      • 1...Bxd1!
    • 1.Rxe2?
      • 1...Bd1
        • 2.Rb2#
        • 2.Qxd1#
      • 1...Bd3
        • 2.Rb2#
        • 2.Qxd3#
      • 1...Be4
        • 2.Rb2#
        • 2.Qd1#
      • 1...Bf5
        • 2.Rb2#
        • 2.Qd1#
      • 1...Bg6
        • 2.Rb2#
        • 2.Qd1#
      • 1...Bh7
        • 2.Rb2#
        • 2.Qd1#
      • 1...Bxb3!
  • Keys
    • 1.Qd3!
      • threat
        • 2.Qxc2#
      • 1...Bxd3
        • 2.Rb2#
      • 1...Sd4
        • 2.Rd1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • B(b);OGATE::R1(A)
  • Tries
    • Try
      • R(A);CHECK
      • Vars
        • S(c);N_GUARD,P_SPINS(c)::R1(A),XS(c)
      • Refutation
        • B(b);XR(A)
    • Try
      • R(A);XS(c)
      • Refutation
        • B(b);XS(C)
  • Actual
    • Q(D);P_PINB(b)
    • Threat
      • QAB1(D),XB(b)
    • Vars
      • B(b);N_SPINB(b),OGATE,XQ(D)::R1(A)
      • S(c);N_GUARD::R(A)
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