MESON Chess Problem Database

Problem Display
PID: 235469 (5R2/2pQ4/3p2pp/R2NNn1r/4k1rp/4P1pK/2P1b1P1/B4n2 w - - 0 1)

Shanshin, Valery Yurevich

Schach, 2015

5R2/2pQ4/3p2pp/R2NNn1r/4k1rp/4P1pK/2P1b1P1/B4n2

#2

10 + 12

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Bd3
      • 2.cxd3#
    • 1...Bf3
      • 2.gxf3#
    • 1...g5
      • 2.Qxf5#
  • Tries
    • 1.Sd3?
      • threat
        • 2.Qe6#
      • 1...S5xe3
        • 2.Sf6#
      • 1...Se7
        • 2.Qa4#
      • 1...Sg7
        • 2.Qa4#
      • 1...Sd4!
    • 1.Sc4?
      • threat
        • 2.Sc3#
        • 2.Sf6#
        • 2.Qe6#
      • 1...Bxc4
        • 2.Qe6#
      • 1...S1xe3
        • 2.Sd2#
        • 2.Qe6#
      • 1...Sd4
        • 2.Sc3#
        • 2.Sf6#
      • 1...Se7
        • 2.Sc3#
        • 2.Sf6#
      • 1...Sg7
        • 2.Sc3#
        • 2.Sf6#
      • 1...S5xe3!
    • 1.Sxg4?
      • threat
        • 2.Sgf6#
        • 2.Sc3#
        • 2.Sdf6#
        • 2.Qe6#
      • 1...S1xe3
        • 2.Sgf6#
        • 2.Qe6#
      • 1...S5xe3
        • 2.Sgf6#
        • 2.Rf4#
      • 1...Sd4
        • 2.Sc3#
        • 2.Sdf6#
        • 2.Rf4#
      • 1...Se7
        • 2.Sgf6#
        • 2.Sc3#
        • 2.Sdf6#
        • 2.Rf4#
      • 1...Sg7
        • 2.Sgf6#
        • 2.Sc3#
        • 2.Sdf6#
        • 2.Rf4#
      • 1...Bxg4+!
    • 1.Qa4+?
      • 1...Sd4
        • 2.Qxd4#
      • 1...Bc4!
  • Keys
    • 1.Sf3!
      • threat
        • 2.Qe6#
      • 1...S5xe3
        • 2.Sc3#
      • 1...Sd4
        • 2.Qxg4#
      • 1...Se7
        • 2.Qxg4#
      • 1...Sg7
        • 2.Qxg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • B(b);OGATE::P(B),XB(b)
    • B(b);OGATE::P(C),XB(b)
    • P(j);N_GUARD,S_CUTR(h)::QAB1(I),XS(g)
  • Tries
    • Try
      • S(H);
      • Threat
        • QAR2(I)
      • Vars
        • S(g);SBLOCK,XP(D)::S(G)
        • S(g);N_GUARD::QAR(I)
      • Refutation
        • S(g);
    • Try
      • S(H);
      • Threat
        • DUALS(3)
      • Vars
        • B(b);XS(H)::QAR2(I)
      • Refutation
        • S(g);XP(D)
    • Try
      • S(H);XR(e)
      • Threat
        • DUALS(4)
      • Refutation
        • B(b);CHECK,XS(H)
    • Try
      • Q(I);CHECK
      • Vars
        • S(g);N_GUARD,P_SPINS(g)::QAR1(I),XS(g)
      • Refutation
        • B(b);P_SPINB(b)
  • Actual
    • S(H);
    • Threat
      • QAR2(I)
    • Vars
      • S(g);SBLOCK,XP(D)::S(G)
      • S(g);OGATE::QAR2(I),XR(e)
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