MESON Chess Problem Database

Problem Display
PID: 233745 (Q1nR3b/1r3N1b/n7/3p4/2p1k3/1N4PB/4K3/8 w - - 0 1)

Pankratiev, Aleksandr Nikolaevich

Freie Presse, 1989

Q1nR3b/1r3N1b/n7/3p4/2p1k3/1N4PB/4K3/8

#2

7 + 8

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rxb3
      • 2.Qxd5#
    • 1...Rb4
      • 2.Qxd5#
    • 1...Rb6
      • 2.Qxd5#
    • 1...Ra7
      • 2.Qxd5#
    • 1...Rc7
      • 2.Qxd5#
    • 1...Re7
      • 2.Qxd5#
    • 1...Rxf7
      • 2.Qxd5#
    • 1...Rb8
      • 2.Qxd5#
    • 1...Bf5
      • 2.Bg2#
    • 1...Bd4
      • 2.Sd2#
    • 1...Be5
      • 2.Sg5#
    • 1...d4
      • 2.Sd2#
      • 2.Qxb7#
  • Keys
    • 1.Rxd5!
      • threat
        • 2.Bg2#
      • 1...Kxd5
        • 2.Qxb7#
      • 1...Rxb3
        • 2.Sg5#
      • 1...Rxf7
        • 2.Sd2#
      • 1...Be5
        • 2.Rxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 1
    • REMOVED MATES = 8
  • Sets
    • R(e);OGATE,P_SPINP(c),XS(B)::QAB1(F),XP(c)
    • R(e);OGATE,P_SPINP(c)::QAB1(F),XP(c)
    • R(e);OGATE,P_SPINP(c),XS(E)::QAB1(F),XP(c)
    • B(f);SBLOCK::B(D)
    • B(h);SBLOCK::S(B)
    • B(h);SBLOCK::S(E)
  • Actual
    • R(G);XP(c)
    • Threat
      • B(D)
    • Vars
      • K(b);OGATEB,P_SPINR(e),S_FLIGHT,XR(G)::QAB(F),XR(e)
      • R(e);XS(B)::S(E)
      • R(e);XS(E)::S(B)
      • B(h);N_GUARD::R1(G),XB(h)
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