MESON Chess Problem Database

Problem Display
PID: 232298 (4Q3/8/3ppp2/1R1PkP1R/4b3/1P1prp2/3PpB2/4K1N1 w - - 0 1)

Bikov, Nikolai Aleksandrovich

Freie Presse, 1973

4Q3/8/3ppp2/1R1PkP1R/4b3/1P1prp2/3PpB2/4K1N1

#2

10 + 9

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Rb4?
      • 1...Kxd5
        • 2.Qb5#
      • 1...Bxd5
        • 2.Bg3#
      • 1...Bxf5
        • 2.Qxe6#
      • 1...Kf4!
    • 1.Qxe6+?
      • 1...Kd4
        • 2.Bxe3#
        • 2.Qxf6#
      • 1...Kf4!
    • 1.dxe3?
      • threat
        • 2.Bg3#
        • 2.Qxe6#
      • 1...Bxd5
        • 2.Qxe6#
      • 1...Bxf5
        • 2.Qxe6#
      • 1...d2+!
  • Keys
    • 1.Rh4!
      • 1...Kd4
        • 2.Sxf3#
      • 1...Kxf5
        • 2.Qh5#
      • 1...Bxd5
        • 2.Qxe6#
      • 1...Bxf5
        • 2.Bg3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(F);
      • Vars
        • K(f);N_SPINP(h),OGATEB,P-FLIGHT,XP(G)::QAR2(J)
        • B(e);SBLOCK,XP(G)::B(D)
        • B(e);P_SPINB(e),XP(H)::QAR1(J),XP(h)
      • Refutation
        • K(f);N_SPINP(h),P_SPINB(e),S_FLIGHT
    • Try
      • Q(J);CHECK,XP(h)
      • Refutation
        • K(f);S_FLIGHT
    • Try
      • P(C);XR(c)
      • Threat
        • DUALS(2)
      • Vars
        • B(e);P_SPINB(e),XP(G)::QAR1(J),XP(h)
        • B(e);P_SPINB(e),XP(H)::QAR1(J),XP(h)
      • Refutation
        • P(b);CHECK
  • Actual
    • R(I);
    • Vars
      • K(f);N_SPINP(h),P_SPINB(e),P_SPINR(c),S_FLIGHT::S(B),XP(d)
      • K(f);N_SPINP(h),OGATEB,P-FLIGHT,XP(H)::QAR2(J)
      • B(e);P_SPINB(e),XP(G)::QAR1(J),XP(h)
      • B(e);SBLOCK,XP(H)::B(D)
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