MESON Chess Problem Database

Problem Display
PID: 263079 (8/7b/1K1p4/P2k1p1R/1p1N4/1p2RN2/Br2P1Q1/8 w - - 0 1)

Permyakov, Evgeni Nikolaevich

HM., SuperProblem, 2012

8/7b/1K1p4/P2k1p1R/1p1N4/1p2RN2/Br2P1Q1/8

#2

9 + 7

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Rd2
      • 2.Bxb3#
    • 1...Rxe2
      • 2.Bxb3#
    • 1...Bg8
      • 2.Qxg8#
  • Tries
    • 1.Sc2?
      • threat
        • 2.Sd2#
      • 1...Kc4
        • 2.Sd2#
      • 1...Rxc2!
    • 1.Sxb3?
      • threat
        • 2.Sfd2#
      • 1...Kc4
        • 2.Sbd2#
      • 1...Rxb3
        • 2.Bxb3#
      • 1...Rd2
        • 2.Sfxd2#
      • 1...Rxe2!
    • 1.Sb5?
      • threat
        • 2.Sd2#
      • 1...Rxe2
        • 2.Bxb3#
      • 1...Rd2
        • 2.Sxd2#
        • 2.Bxb3#
      • 1...Kc4!
    • 1.Sc6?
      • threat
        • 2.Sd2#
      • 1...Rxe2
        • 2.Bxb3#
      • 1...Rd2
        • 2.Sxd2#
        • 2.Bxb3#
      • 1...Kc4!
    • 1.Se6?
      • threat
        • 2.Sd2#
      • 1...Rxe2
        • 2.Bxb3#
      • 1...Rd2
        • 2.Sxd2#
        • 2.Bxb3#
      • 1...Kc4!
  • Keys
    • 1.Sxf5!
      • threat
        • 2.Sd2#
      • 1...Kc4
        • 2.Sxd6#
      • 1...Rxe2
        • 2.Bxb3#
      • 1...Bxf5
        • 2.Qg8#
      • 1...Rd2
        • 2.Sxd2#
        • 2.Bxb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • R(a);N_GUARD::B(A),XP(b)
    • R(a);N_GUARD,XP(B)::B(A),XP(b)
    • B(g);N_GUARD::QAB(C),XB(g)
  • Tries
    • Try
      • S(F);
      • Threat
        • QAB(C)+S(E)
      • Vars
        • K(d);S_FLIGHT::S(E)
      • Refutation
        • R(a);XS(F)
    • Try
      • S(F);P_PINP(e),XP(b)
      • Threat
        • QAB(C)+S(E)
      • Vars
        • K(d);N_SPINP(e),S_FLIGHT::B(A)+S(F),DCHECK
        • R(a);OGATE,P_SPINR(a),XS(F)::B(A),XR(a)
        • R(a);::QAB(C)+S(E),XR(a)
      • Refutation
        • R(a);XP(B)
    • Try
      • S(F);
      • Threat
        • QAB(C)+S(E)
      • Vars
        • R(a);N_GUARD,XP(B)::B(A),XP(b)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • S(F);
      • Threat
        • QAB(C)+S(E)
      • Vars
        • R(a);N_GUARD,XP(B)::B(A),XP(b)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • S(F);
      • Threat
        • QAB(C)+S(E)
      • Vars
        • R(a);N_GUARD,XP(B)::B(A),XP(b)
      • Refutation
        • K(d);S_FLIGHT
  • Actual
    • S(F);XP(e)
    • Threat
      • QAB(C)+S(E)
    • Vars
      • K(d);N_GUARD,S_CUTB(g),S_FLIGHT::S(F),XP(f)
      • R(a);N_GUARD,XP(B)::B(A),XP(b)
      • B(g);N_GUARD,P_SPINB(g),XS(F)::QAB(C)
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