MESON Chess Problem Database

Problem Display
PID: 274999 (8/B3prn1/3PNbn1/3Pk3/3RPR2/Q6p/1P5K/8 w - - 0 1)

Pankratiev, Aleksandr Nikolaevich

Problem Paradise, 2023

8/B3prn1/3PNbn1/3Pk3/3RPR2/Q6p/1P5K/8

#2

10 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Sf5
      • 2.Rxf5#
    • 1...Sh5
      • 2.Rf5#
    • 1...Sxe6
      • 2.Rf5#
    • 1...Se8
      • 2.Rf5#
  • Tries
    • 1.Ra4?
      • threat
        • 2.Bd4#
      • 1...Sxe6
        • 2.Rf5#
      • 1...Sf5
        • 2.Rxf5#
      • 1...Sxf4!
    • 1.Rc4?
      • threat
        • 2.Bd4#
      • 1...Sxe6
        • 2.Rf5#
      • 1...Sf5
        • 2.Rxf5#
      • 1...Sxf4!
    • 1.Qg3?
      • threat
        • 2.Rf5#
      • 1...Sxf4
        • 2.Qxf4#
      • 1...Sf5
        • 2.Rxf5#
      • 1...Kxd6!
    • 1.d7?
      • threat
        • 2.Bb8#
      • 1...Sxe6
        • 2.Rf5#
      • 1...Sf5
        • 2.Rxf5#
      • 1...Se8
        • 2.Rf5#
      • 1...Rf8!
  • Keys
    • 1.Sc5!
      • threat
        • 2.Sd3#
      • 1...Kxd4
        • 2.Qc3#
      • 1...Kxf4
        • 2.Qg3#
      • 1...Kxd6
        • 2.Bb8#
      • 1...Sxf4
        • 2.Sd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 4
  • Sets
    • S(g);N_GUARD::R1(F),XS(g)
    • S(g);N_GUARD::R1(F)
    • S(g);N_GUARD,XS(I)::R1(F)
  • Tries
    • Try
      • R(D);
      • Threat
        • B(J)
      • Vars
        • S(g);N_GUARD,XS(I)::R1(F)
        • S(g);N_GUARD::R1(F),XS(g)
      • Refutation
        • S(d);XR(F)
    • Try
      • R(D);
      • Threat
        • B(J)
      • Vars
        • S(g);N_GUARD,XS(I)::R1(F)
        • S(g);N_GUARD::R1(F),XS(g)
      • Refutation
        • S(d);XR(F)
    • Try
      • Q(C);
      • Threat
        • QAB(C)+R(F),DCHECK
      • Vars
        • S(d);OGATE,P_SPINS(d),XR(F)::QAB1(C),XS(d)
        • S(g);::QAB(C)+R(F),DCHECK,XS(g)
      • Refutation
        • K(b);S_FLIGHT,XP(H)
    • Try
      • P(H);
      • Threat
        • B(J)
      • Vars
        • S(g);N_GUARD,XS(I)::R1(F)
        • S(g);N_GUARD::R1(F),XS(g)
        • S(g);N_GUARD::R1(F)
      • Refutation
        • R(f);
  • Actual
    • S(I);
    • Threat
      • S(I)
    • Vars
      • K(b);OGATEB,S_FLIGHT,XR(D)::QAB1(C)
      • K(b);OGATEB,S_FLIGHT,XR(F)::QAB1(C)
      • K(b);OGATEB,S_FLIGHT,XP(H)::B(J)
      • S(d);SBLOCK,XR(F)::S(I)
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