MESON Chess Problem Database

Problem Display
PID: 260898 (3R1K2/1n3Q2/3NpN2/1p2k3/1P2P1p1/4P3/5r2/1B1b4 w - - 0 1)

Shanshin, Valery Yurevich

6th HM., Neue Zurcher Zeitung, 2013

3R1K2/1n3Q2/3NpN2/1p2k3/1P2P1p1/4P3/5r2/1B1b4

#2

9 + 7

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Re2
      • 2.Sxg4#
    • 1...Rf3
      • 2.Sxg4#
    • 1...Bc2
      • 2.Sxg4#
    • 1...Bb3
      • 2.Sxg4#
    • 1...Ba4
      • 2.Sxg4#
    • 1...Sxd6
      • 2.Sd7#
  • Tries
    • 1.Ke7?
      • threat
        • 2.Sd7#
        • 2.Qxe6#
      • 1...Rxf6
        • 2.Qxf6#
      • 1...Sxd8
        • 2.Sd7#
      • 1...Bb3
        • 2.Sxg4#
        • 2.Sd7#
      • 1...Sc5!
    • 1.Sde8?
      • threat
        • 2.Sd7#
      • 1...Rxf6
        • 2.Qxf6#
      • 1...Rc2
        • 2.Qh5#
      • 1...Rd2
        • 2.Qh5#
      • 1...Sc5
        • 2.Qc7#
      • 1...Bc2!
    • 1.Qh5+?
      • 1...Kxf6
        • 2.Se8#
        • 2.e5#
      • 1...Rf5!
  • Keys
    • 1.Qc7!
      • threat
        • 2.Qc3#
      • 1...Rxf6+
        • 2.Sf7#
      • 1...Kxf6
        • 2.Qg7#
      • 1...Sxd8
        • 2.Se8#
      • 1...Rc2
        • 2.Sd7#
      • 1...Rd2
        • 2.Sd7#
      • 1...Sc5
        • 2.Se8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 6
  • Sets
    • R(b);S_CUTB(a)::S(F),XP(c)
    • B(a);N_GUARD::S(F),XP(c)
    • S(g);SBLOCK,XS(E)::S(F)
  • Tries
    • Try
      • K(I);S_FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • R(b);OGATE,XS(F)::QAB1(G),XR(b)
        • S(g);XR(H)::S(F)
      • Refutation
        • S(g);
    • Try
      • S(E);
      • Threat
        • S(F)
      • Vars
        • R(b);OGATE,P_PINQ(G),XS(F)::QAB1(G),XR(b)
        • R(b);N_GUARD::QAR(G)
        • S(g);N_GUARD::QAB(G)
      • Refutation
        • B(a);
    • Try
      • Q(G);CHECK,P_SPINS(F)
      • Refutation
        • R(b);P_SPINR(b)
  • Actual
    • Q(G);P_SPINS(F)
    • Threat
      • QAB(G)
    • Vars
      • R(b);CHECK,SBLOCK,XS(F)::QAB(G)+S(E),DCHECK
      • K(e);OGATEB,S_FLIGHT,XS(F)::QAB1(G)
      • S(g);N_GUARD,XR(H)::QAB(G)+S(E)
      • R(b);N_PINS(F)::S(F)
      • S(g);N_GUARD::QAB(G)+S(E)
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