MESON Chess Problem Database

Problem Display
PID: 264885 (8/3KbB2/8/Qp1R2p1/2bNkP2/3N4/3PP3/2r5 w - - 0 1)

Shanshin, Valery Yurevich

2nd Prize, Pechenkin-100 MT, 2019

8/3KbB2/8/Qp1R2p1/2bNkP2/3N4/3PP3/2r5

#2

9 + 6

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...b4
      • 2.Bg6#
    • 1...gxf4
      • 2.Sf2#
  • Tries
    • 1.Qc7?
      • threat
        • 2.Sf2#
        • 2.Qe5#
      • 1...Bxd3
        • 2.Qe5#
      • 1...Bxd5
        • 2.Qe5#
      • 1...Rf1
        • 2.Qe5#
      • 1...Bf6
        • 2.Sf2#
        • 2.Sc5#
      • 1...Bd6!
    • 1.Qa8?
      • threat
        • 2.Bg6#
      • 1...Bxd5
        • 2.Qxd5#
      • 1...Bxd3!
    • 1.e3?
      • threat
        • 2.Sf2#
      • 1...Kxd3
        • 2.Bg6#
      • 1...Bxd3
        • 2.Re5#
      • 1...Rf1!
  • Keys
    • 1.Se6!
      • threat
        • 2.Re5#
      • 1...Kxd5
        • 2.Qa8#
      • 1...Bxd5
        • 2.Bg6#
      • 1...Bd6
        • 2.Sxg5#
      • 1...Bf6
        • 2.Sec5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • P(d);::B(I)
    • P(e);SBLOCK,XP(E)::S(C)
  • Tries
    • Try
      • Q(F);
      • Threat
        • DUALS(2)
      • Vars
        • B(b);XS(C)::QAR1(F)
        • B(b);XR(G)::QAR1(F)
        • R(a);::QAR1(F)
      • Refutation
        • B(f);
    • Try
      • Q(F);
      • Threat
        • B(I)
      • Vars
        • B(b);OGATE,P_SPINB(b),XR(G)::QAB1(F),XB(b)
      • Refutation
        • B(b);XS(C)
    • Try
      • P(B);
      • Threat
        • S(C)
      • Vars
        • K(c);N_GUARD,S_FLIGHT,XS(C)::B(I)
        • B(b);SBLOCK,XS(C)::R1(G)
      • Refutation
        • R(a);
  • Actual
    • S(D);
    • Threat
      • R1(G)
    • Vars
      • K(c);OGATEB,P_SPINP(d),S_FLIGHT,XR(G)::QAB(F)
      • B(b);SBLOCK,XR(G)::B(I)
      • B(f);N_GUARD::S(D),XP(e)
      • B(f);N_GUARD::S(D)
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