MESON Chess Problem Database

Problem Display
PID: 250775 (2BN4/5P2/3pprb1/pR1pqkrp/PQ5P/2p2Pp1/2N1p1P1/2B1K3 w - - 0 1)

Banny, Dimitry Nikolaevich

4th HM., Thessalonika-2300 JT, 1986-1988

2BN4/5P2/3pprb1/pR1pqkrp/PQ5P/2p2Pp1/2N1p1P1/2B1K3

#2

12 + 13

14867 BCPS Library 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qf4
      • 2.Qxf4#
    • 1...Qe4
      • 2.Qxe4#
    • 1...d4
      • 2.Sxd4#
  • Tries
    • 1.Sc6?
      • threat
        • 2.Se7#
      • 1...Qd4
        • 2.S2xd4#
      • 1...Qf4
        • 2.Qxf4#
      • 1...Qe3
        • 2.Sxe3#
      • 1...Qe4
        • 2.Qxe4#
      • 1...Rxf7!
    • 1.Bxe6+?
      • 1...Qxe6
        • 2.Qf4#
      • 1...Rxe6!
    • 1.Qe4+?
      • 1...dxe4
        • 2.Sd4#
      • 1...Qxe4!
  • Keys
    • 1.Rxd5!
      • threat
        • 2.Se3#
        • 2.Sd4#
        • 2.Qe4#
        • 2.Qf4#
      • 1...Qxd5
        • 2.Qf4#
      • 1...Rxf7
        • 2.Qf4#
      • 1...Bxf7
        • 2.Qe4#
      • 1...axb4
        • 2.Sd4#
      • 1...Bh7
        • 2.Qe4#
      • 1...Rg4
        • 2.Se3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 3
  • Sets
    • Q(f);N_GUARD,N_SPINP(k),P_SPINP(e)::QAR1(G),XQ(f)
    • Q(f);N_GUARD,N_SPINP(k),P_SPINP(e)::QAB1(G),XQ(f)
    • P(e);P_SPINQ(f)::S(C),XP(e)
  • Tries
    • Try
      • S(L);
      • Threat
        • S(L)
      • Vars
        • Q(f);N_GUARD,N_SPINP(k),P_SPINP(e)::S(C),XQ(f)
        • Q(f);N_GUARD,N_SPINP(k),P_SPINP(e)::QAR1(G),XQ(f)
        • Q(f);N_GUARD,N_SPINP(k),P_SPINP(e)::QAB1(G),XQ(f)
      • Refutation
        • R(l);XP(J)
    • Try
      • B(K);CHECK,XP(k)
      • Vars
        • Q(f);P_SPINP(e),XB(K)::QAR1(G)
      • Refutation
        • R(l);XB(K)
    • Try
      • Q(G);CHECK
      • Vars
        • P(e);P_SPINQ(f),XQ(G)::S(C)
      • Refutation
        • Q(f);N_SPINP(k),P_SPINP(e),XQ(G)
  • Actual
    • R(I);P_PINQ(f),XP(e)
    • Threat
      • DUALS(4)
    • Vars
      • Q(f);N_SPINQ(f),XR(I)::QAR1(G)
      • R(l);XP(J)::QAR1(G)
      • B(m);XP(J)::QAB1(G)
      • P(d);XQ(G)::S(C)
      • B(m);::QAB1(G)
      • R(h);::S(C)
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