MESON Chess Problem Database

Problem Display
PID: 165850 (2N1r1b1/8/Q5pK/3r1R2/3NkB2/3R4/2P5/8 w - - 0 1)

Shanshin, Valery Yurevich

2nd Prize, Taras Shevchenko-200, 2014

2N1r1b1/8/Q5pK/3r1R2/3NkB2/3R4/2P5/8

#2

8 + 5

23 Die Schwalbe 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Ra5
      • 2.Sd6#
    • 1...Rb5
      • 2.Sd6#
    • 1...Rc5
      • 2.Sd6#
    • 1...Rd6
      • 2.Sxd6#
  • Tries
    • 1.Qc4?
      • threat
        • 2.Re3#
      • 1...Rxd4
        • 2.Sd6#
      • 1...Rxf5
        • 2.Se6#
      • 1...gxf5!
    • 1.Qxg6?
      • threat
        • 2.Qg2#
      • 1...Rxd4
        • 2.Re3#
      • 1...Rxf5
        • 2.Qxf5#
      • 1...Rd6
        • 2.Sxd6#
      • 1...Re6!
  • Keys
    • 1.Se2!
      • threat
        • 2.Sg3#
      • 1...Kxf5
        • 2.Qxg6#
      • 1...Rxd3
        • 2.Qxd3#
      • 1...Rxf5
        • 2.Sd6#
      • 1...gxf5
        • 2.Re3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 4
  • Sets
    • R(b);N_GUARD::S(H)
    • R(b);N_GUARD::S(H),XR(b)
  • Tries
    • Try
      • Q(F);
      • Threat
        • R1(B)
      • Vars
        • R(b);N_GUARD,P_SPINR(b),XS(C)::S(H)
        • R(b);N_GUARD,SBLOCK,XR(E)::QAR(F)+S(C)
      • Refutation
        • P(c);XR(E)
    • Try
      • Q(F);XP(c)
      • Threat
        • QAB(F)
      • Vars
        • R(b);SBLOCK,XS(C)::R1(B)
        • R(b);OGATE,P_SPINR(b),XR(E)::QAB1(F),XR(b)
        • R(b);N_GUARD,P_PINQ(F)::S(H),XR(b)
      • Refutation
        • R(d);P_PINQ(F)
  • Actual
    • S(C);
    • Threat
      • S(C)
    • Vars
      • K(a);OGATEB,S_FLIGHT,XR(E)::QAB1(F),XP(c)
      • R(b);OGATE,XR(B)::QAB1(F),XR(b)
      • R(b);N_GUARD,XR(E)::S(H)
      • P(c);SBLOCK,XR(E)::R1(B)
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