MESON Chess Problem Database

Problem Display
PID: 251190 (r1Rq1N2/1R1pkPQ1/p1PnP1P1/2Bpr3/1N4p1/4n3/8/6K1 w - - 0 1)

Kovacevic, Marjan

Murashev, Pavel Aleksandrovich

2nd Prize, Uralski Problemist-20 JT, 2013

r1Rq1N2/1R1pkPQ1/p1PnP1P1/2Bpr3/1N4p1/4n3/8/6K1

#2

11 + 10

15601 Albrecht-Leiss-Degener Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qa5
      • 2.Rxd7#
    • 1...Qb6
      • 2.Rxd7#
    • 1...Qe8
      • 2.fxe8Q#
      • 2.fxe8S#
      • 2.fxe8B#
      • 2.fxe8R#
  • Tries
    • 1.Sxd7?
      • threat
        • 2.Qf6#
      • 1...Kxe6
        • 2.Qxe5#
      • 1...Qxd7
        • 2.f8S#
      • 1...Rxe6
        • 2.f8Q#
        • 2.f8R#
      • 1...Qh8
        • 2.Sf8#
      • 1...Rf5!
    • 1.Qf6+?
      • 1...Kxf8
        • 2.Bxd6#
        • 2.g7#
      • 1...Kxf6!
  • Keys
    • 1.cxd7!
      • threat
        • 2.Sc6#
      • 1...Qxc8
        • 2.dxc8Q#
        • 2.dxc8R#
      • 1...Qxf8
        • 2.d8S#
      • 1...Rxc8
        • 2.dxc8S#
      • 1...Qb6
        • 2.d8Q#
        • 2.d8B#
      • 1...Qc7
        • 2.d8Q#
        • 2.d8B#

There are these versions: 251207

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • Q(j);N_GUARD::R1(G),XP(g)
  • Tries
    • Try
      • S(K);XP(g)
      • Threat
        • QAB1(I)
      • Vars
        • K(h);N_SPINS(f),OGATEB,P-FLIGHT,XP(E)::QAR1(I),XR(d)
        • Q(j);P_SPINQ(j),XS(K)::P=S
        • R(d);SBLOCK,XP(E)::P=Q
        • Q(j);N_GUARD::R(G)+S(K)
      • Refutation
        • R(d);
    • Try
      • Q(I);CHECK
      • Refutation
        • K(h);N_SPINP(g),N_SPINS(f),S_FLIGHT,XQ(I)
  • Actual
    • P(D);XP(g)
    • Threat
      • S(B)
    • Vars
      • Q(j);OGATE,XR(J)::PXQ(j)=Q
      • Q(j);OGATE,XS(K)::P=S
      • R(i);OGATE,XR(J)::PXR(i)=S
      • Q(j);OGATE::P=Q
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