MESON Chess Problem Database

Problem Display
PID: 251191 (qnR2b1B/p2p4/2PPRP2/1NPk1p2/KP1Np1Q1/1P5b/6P1/8 w - - 0 1)

Shanshin, Valery Yurevich

3rd Prize, Uralski Problemist-20 JT, 2013

qnR2b1B/p2p4/2PPRP2/1NPk1p2/KP1Np1Q1/1P5b/6P1/8

#2

14 + 9

15601 Albrecht-Leiss-Degener Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Bxg2
      • 2.Qxf5#
    • 1...e3
      • 2.Sc3#
      • 2.Sc7#
      • 2.Qf3#
  • Tries
    • 1.Qd1?
      • threat
        • 2.Sc3#
        • 2.Sc7#
      • 1...Bxd6
        • 2.Sc3#
      • 1...dxe6
        • 2.Sf3#
      • 1...Qb7
        • 2.Sc3#
      • 1...Sa6
        • 2.Sc3#
      • 1...Qxc6!
    • 1.Qg8?
      • threat
        • 2.Re7#
        • 2.Ree8#
      • 1...dxe6
        • 2.Qxe6#
      • 1...Be7
        • 2.Rxe7#
      • 1...f4!
    • 1.f7?
      • threat
        • 2.Sc3#
        • 2.Sc7#
        • 2.Re5#
      • 1...Qxc6
        • 2.Re5#
      • 1...Bxd6
        • 2.Sc3#
        • 2.Rxd6#
      • 1...Sxc6
        • 2.Sc3#
        • 2.Sc7#
      • 1...dxe6
        • 2.Sc3#
        • 2.Sc7#
      • 1...Qb7
        • 2.Sc3#
        • 2.Re5#
      • 1...Sa6
        • 2.Sc3#
        • 2.Re5#
      • 1...Bg7!
  • Keys
    • 1.Sf3!
      • threat
        • 2.Re5#
      • 1...Kxe6
        • 2.Qg8#
      • 1...Bxd6
        • 2.Rxd6#
      • 1...Sxc6
        • 2.Sc7#
      • 1...exf3
        • 2.Qc4#
      • 1...dxe6
        • 2.Sc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • B(a);N_GUARD,XP(A)::QAR2(F),XP(d)
  • Tries
    • Try
      • Q(F);
      • Threat
        • DUALS(2)
      • Vars
        • B(i);XP(J)::S(G)
        • P(f);SBLOCK,XR(K)::QAR(F)+S(E)
        • Q(g);::S(G)
        • S(h);::S(G)
      • Refutation
        • Q(g);P_PINS(G),XP(I)
    • Try
      • Q(F);
      • Threat
        • DUALS(2)
      • Vars
        • P(f);OGATE,P_SPINP(f),XR(K)::QAB1(F),XP(f)
        • B(i);::QAB(F)+R(K),XB(i)
      • Refutation
        • P(d);
    • Try
      • P(L);
      • Threat
        • DUALS(3)
      • Vars
        • Q(g);P_PINS(G),XP(I)::R1(K)
      • Refutation
        • B(i);
  • Actual
    • S(E);
    • Threat
      • R1(K)
    • Vars
      • K(c);OGATEB,P_SPINP(d),S_FLIGHT,XR(K)::QAB(F)
      • B(i);OGATE,XP(J)::R1(K),XB(i)
      • S(h);SBLOCK,XP(I)::S(G)
      • P(b);OGATE,XS(E)::QAB1(F)
      • P(f);SBLOCK,XR(K)::S(G)
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