MESON Chess Problem Database

Problem Display
PID: 67815 (4Qrb1/1R5p/3pp3/3R3N/2K1kp2/8/2NPBn1b/8 w - - 0 1)

Shanshin, Valery Yurevich

Phenix, 1999

4Qrb1/1R5p/3pp3/3R3N/2K1kp2/8/2NPBn1b/8

#2

8 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Rf6
      • 2.Sxf6#
    • 1...Rf7
      • 2.Qxe6#
    • 1...Rxe8
      • 2.Sf6#
    • 1...Bf7
      • 2.Sf6#
    • 1...Sd1
      • 2.d3#
    • 1...Sh1
      • 2.d3#
    • 1...Sh3
      • 2.d3#
    • 1...Sg4
      • 2.d3#
  • Tries
    • 1.Qg6+?
      • 1...Rf5
        • 2.Sf6#
      • 1...hxg6!
  • Keys
    • 1.Rf7!
      • threat
        • 2.Sf6#
        • 2.Qxe6#
      • 1...Rxf7
        • 2.Qxe6#
      • 1...Rxe8
        • 2.Sf6#
      • 1...Bxf7
        • 2.Sf6#
      • 1...Sd3
        • 2.Sf6#
      • 1...Sg4
        • 2.d3#
      • 1...f3
        • 2.Bxf3#
      • 1...e5
        • 2.Rd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • R(h);N_GUARD::S(F),XR(h)
    • R(h);S_CUTB(i)::QAR2(H),XP(f)
    • R(h);N_GUARD,N_SPINP(f),XQ(H)::S(F)
    • B(i);S_CUTR(h)::S(F)
    • S(a);N_GUARD::P(B)
  • Tries
    • Try
      • Q(H);CHECK,N_PINP(f)
      • Vars
        • R(h);P_SPINR(h)::S(F)
      • Refutation
        • P(g);XQ(H)
  • Actual
    • R(G);
    • Threat
      • DUALS(2)
    • Vars
      • R(h);XR(G)::QAR2(H),XP(f)
      • R(h);N_SPINP(f),XQ(H)::S(F)
      • B(i);XR(G)::S(F)
      • S(a);::S(F)
      • S(a);N_GUARD::P(B)
      • P(d);::B(C),XP(d)
      • P(f);::R1(E)
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