MESON Chess Problem Database

Problem Display
PID: 264860 (4B3/6p1/pp1Nn3/n2kPP1p/3P4/1P2R1Br/K1R1N3/6b1 w - - 0 1)

Shanshin, Valery Yurevich

Vasilenko, Anatoly Grigorovich

3rd Prize, Pechenkin-100 MT, 2019

4B3/6p1/pp1Nn3/n2kPP1p/3P4/1P2R1Br/K1R1N3/6b1

#2

11 + 9

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Sxb3
      • 2.Bc6#
    • 1...Sc4
      • 2.bxc4#
    • 1...Sc6
      • 2.Bxc6#
    • 1...Sb7
      • 2.Bc6#
    • 1...Sxd4
      • 2.Sf4#
  • Tries
    • 1.Sf4+?
      • 1...Kxd4
        • 2.Re4#
      • 1...Sxf4!
    • 1.Sc4?
      • threat
        • 2.Sxb6#
      • 1...Sxc4
        • 2.bxc4#
      • 1...b5
        • 2.Sb6#
      • 1...Bxe3!
    • 1.Sb5?
      • threat
        • 2.Sec3#
        • 2.Sbc3#
      • 1...Sxb3
        • 2.Bc6#
      • 1...Sxd4
        • 2.Sf4#
        • 2.Sc7#
      • 1...axb5!
    • 1.Sc8?
      • threat
        • 2.Sxb6#
        • 2.Se7#
      • 1...Sc4
        • 2.Se7#
        • 2.bxc4#
      • 1...Sc6
        • 2.Sxb6#
        • 2.Bxc6#
      • 1...b5
        • 2.Sb6#
        • 2.Se7#
      • 1...Bxe3!
    • 1.Rc4?
      • threat
        • 2.Sc3#
      • 1...Sxc4
        • 2.bxc4#
      • 1...Rh2!
    • 1.Rd3?
      • threat
        • 2.Sc3#
      • 1...Sxd4
        • 2.Bf7#
      • 1...Bxd4!
  • Keys
    • 1.Se4!
      • threat
        • 2.S4c3#
      • 1...Sxb3
        • 2.Bc6#
      • 1...Sxd4
        • 2.S2c3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 3
  • Sets
    • S(c);N_GUARD,XP(D)::B(K)
    • S(c);OGATE::P(D),XS(c)
    • S(c);N_GUARD::B(K),XS(c)
    • S(c);N_GUARD::B(K)
    • S(h);N_GUARD,SBLOCK,XP(G)::S(C)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(d);P-FLIGHT,S_CUTS(h),XP(G)::R1(E)
      • Refutation
        • S(h);XS(C)
    • Try
      • S(J);
      • Threat
        • S(J),XP(g)
      • Vars
        • S(c);OGATE,XS(J)::P(D),XS(c)
        • P(g);::S(J)
      • Refutation
        • B(a);XR(E)
    • Try
      • S(J);
      • Threat
        • DUALS(2)
      • Vars
        • S(c);N_GUARD,XP(D)::B(K)
      • Refutation
        • P(f);XS(J)
    • Try
      • S(J);
      • Threat
        • DUALS(2)
      • Refutation
        • B(a);XR(E)
    • Try
      • R(B);
      • Threat
        • S(C)
      • Vars
        • S(c);OGATE,XR(B)::P(D),XS(c)
      • Refutation
        • R(b);P_PINS(C)
    • Try
      • R(E);
      • Threat
        • S(C)
      • Vars
        • S(h);OGATEB,P_SPINS(h),XP(G)::B(K)
      • Refutation
        • B(a);P_SPINB(a),XP(G)
  • Actual
    • S(J);
    • Threat
      • S(J)
    • Vars
      • S(c);N_GUARD,XP(D)::B(K)
      • S(h);SBLOCK,XP(G)::S(C)
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