MESON Chess Problem Database

Problem Display
PID: 269797 (1B1K4/3B4/5p2/3N1r2/4kp2/2R5/1n1Q4/3n4 w - - 0 1)

Chernyavsky, Mykola Vasilovich

Shanshin, Valery Yurevich

Prize, Hannelius-100 MT (Tehtavanieka), 2017

1B1K4/3B4/5p2/3N1r2/4kp2/2R5/1n1Q4/3n4

#2

6 + 6

15652 Tehtavaniekka 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd5
      • 2.Qxf4#
    • 1...Re5
      • 2.Sxf6#
    • 1...Rg5
      • 2.Sxf6#
    • 1...Rh5
      • 2.Sxf6#
    • 1...Sd3
      • 2.Qxd3#
    • 1...Sa4
      • 2.Qd3#
    • 1...Sc4
      • 2.Qd3#
  • Tries
    • 1.Rh3?
      • 1...Rxd5
        • 2.Qxf4#
      • 1...Sd3
        • 2.Qxd3#
      • 1...Re5
        • 2.Sxf6#
      • 1...Rg5
        • 2.Sxf6#
      • 1...Rh5
        • 2.Sxf6#
      • 1...Sf2
        • 2.Sc3#
      • 1...Sc3
        • 2.Sxc3#
      • 1...Se3
        • 2.Sc3#
      • 1...Sa4
        • 2.Qd3#
      • 1...Sc4
        • 2.Qd3#
      • 1...f3!
  • Keys
    • 1.Bc6!
      • threat
        • 2.Sxf6#
      • 1...Rxd5+
        • 2.Qxd5#
      • 1...Re5
        • 2.Qxf4#
      • 1...Rg5
        • 2.Qxf4#
      • 1...Rh5
        • 2.Qxf4#
      • 1...Sd3
        • 2.Qxd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 4
    • ADDED MATES = 0
    • REMOVED MATES = 2
  • Sets
    • R(e);N_GUARD,P_PINB(D),SBLOCK,XS(C)::QAR1(A),XP(d)
    • R(e);N_GUARD::S(C),XP(f)
    • S(b);N_GUARD::QAB1(A),XS(b)
    • S(b);N_GUARD::QAB1(A)
  • Tries
    • Try
      • R(B);
      • Vars
        • R(e);N_GUARD,P_PINB(D),SBLOCK,XS(C)::QAR1(A),XP(d)
        • S(b);N_GUARD::QAB1(A),XS(b)
        • R(e);N_GUARD::S(C),XP(f)
        • S(a);N_GUARD::S(C)
        • S(a);N_GUARD::S(C),XS(a)
        • S(b);N_GUARD::QAB1(A)
      • Refutation
        • P(d);
  • Actual
    • B(D);
    • Threat
      • B(D)+S(C),DCHECK,XP(f)
    • Vars
      • R(e);CHECK,OGATE,P_SPINR(e),XS(C)::QAB1(A),XR(e)
      • R(e);N_GUARD::QAR1(A),XP(d)
      • S(b);N_GUARD::QAB1(A),XS(b)
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