MESON Chess Problem Database

Problem Display
PID: 261297 (qnr1rB2/1Pbppn2/1pPkpNb1/NP2Rpp1/2BP1P2/8/8/7K w - - 0 1)

Lipton, Michael

Neue Zurcher Zeitung, 1984

(First published on Fri Dec 7 1984)

qnr1rB2/1Pbppn2/1pPkpNb1/NP2Rpp1/2BP1P2/8/8/7K

#2

11 + 14

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Qxb7
      • 2.Sxb7#
    • 1...Bd8
      • 2.Sxe8#
    • 1...Sxe5
      • 2.fxe5#
    • 1...Sd8
      • 2.bxc8S#
    • 1...dxc6
      • 2.Rxe6#
  • Tries
    • 1.Bxe7+?
      • 1...Rxe7
        • 2.bxc8S#
      • 1...Kxe7!
  • Keys
    • 1.cxd7!
      • threat
        • 2.Rxe6#
      • 1...Qxb7+
        • 2.Sxb7#
      • 1...Sxe5
        • 2.fxe5#
      • 1...Bd8
        • 2.dxe8S#
      • 1...Sd8
        • 2.dxc8S#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 1
  • Sets
    • Q(k);P_PINP(H),XP(J)::S(E),XQ(k)
    • B(g);S_CUTR(m)::S(I),XR(n)
    • S(j);OGATE,XR(G)::P(D),XS(j)
    • S(j);S_CUTR(n)::PXR(m)=S
    • P(h);N_GUARD,XP(H)::R1(G),XP(e)
  • Tries
    • Try
      • B(K);CHECK,XP(i)
      • Vars
        • R(n);N_GUARD,XB(K)::PXR(m)=S
      • Refutation
        • K(d);P_SPINP(e),S_FLIGHT,XB(K)
  • Actual
    • P(H);P_SPINP(J),XP(h)
    • Threat
      • R1(G),XP(e)
    • Vars
      • Q(k);CHECK,XP(J)::S(E),XQ(k)
      • S(j);OGATE,XR(G)::P(D),XS(j)
      • B(g);S_CUTR(m)::PXR(n)=S
      • S(j);S_CUTR(n)::PXR(m)=S
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