MESON Chess Problem Database

Problem Display
PID: 258297 (7Q/8/1P6/8/B3K3/p7/PP2N3/rkN5 w - - 0 1)

Chernyavsky, Mykola Vasilovich

Kapustin, Fedor Mikhailovich

StrateGems, 2022

7Q/8/1P6/8/B3K3/p7/PP2N3/rkN5

#2

8 + 3

SOLUTION

  • SOUND
  • Tries
    • 1.Ke3?
      • 1...axb2
        • 2.Qh7#
      • 1...Rxa2!
    • 1.Kf3?
      • 1...axb2
        • 2.Qh7#
      • 1...Rxa2!
    • 1.Kf4?
      • 1...axb2
        • 2.Qh7#
      • 1...Rxa2!
    • 1.Kd5?
      • 1...axb2
        • 2.Qh7#
      • 1...Rxa2!
    • 1.Sc3+?
      • 1...Kxb2
        • 2.Sd3#
      • 1...Kxc1!
    • 1.Qd4?
      • 1...axb2
        • 2.Qd3#
      • 1...Rxa2!
    • 1.Qh1?
      • 1...Rxa2
        • 2.Sd3#
      • 1...axb2
        • 2.Sc3#
      • 1...Kxb2!
    • 1.Qh3?
      • 1...Kxb2
        • 2.Qb3#
      • 1...axb2
        • 2.Qd3#
      • 1...Rxa2!
    • 1.Qc8?
      • threat
        • 2.Qc2#
      • 1...Kxb2
        • 2.Qc2#
      • 1...Rxa2!
    • 1.Qg8?
      • 1...Kxb2
        • 2.Qb3#
      • 1...Rxa2
        • 2.Qxa2#
      • 1...axb2!
  • Keys
    • 1.Sd3!
      • threat
        • 2.Sc3#
      • 1...Kxa2
        • 2.Sc3#
      • 1...Rxa2
        • 2.Qh1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(F);P-FLIGHT
      • Vars
        • P(c);SBLOCK,XP(C)::QAB(H)
      • Refutation
        • R(a);XP(B)
    • Try
      • K(F);S_FLIGHT
      • Vars
        • P(c);SBLOCK,XP(C)::QAB(H)
      • Refutation
        • R(a);XP(B)
    • Try
      • K(F);P-FLIGHT
      • Vars
        • P(c);SBLOCK,XP(C)::QAB(H)
      • Refutation
        • R(a);XP(B)
    • Try
      • K(F);S_FLIGHT
      • Vars
        • P(c);SBLOCK,XP(C)::QAB(H)
      • Refutation
        • R(a);XP(B)
    • Try
      • S(D);CHECK
      • Vars
        • K(b);P-FLIGHT,XP(C)::S(A)
      • Refutation
        • K(b);P-FLIGHT,XS(A)
    • Try
      • Q(H);
      • Vars
        • P(c);SBLOCK,XP(C)::QAB(H)
      • Refutation
        • R(a);XP(B)
    • Try
      • Q(H);
      • Vars
        • R(a);SBLOCK,XP(B)::QAR(H)+S(A)
        • P(c);SBLOCK,XP(C)::S(D)
      • Refutation
        • K(b);P-FLIGHT,XP(C)
    • Try
      • Q(H);
      • Vars
        • K(b);OGATEB,P-FLIGHT,XP(C)::QAR1(H)
        • P(c);SBLOCK,XP(C)::QAB(H)
      • Refutation
        • R(a);XP(B)
    • Try
      • Q(H);
      • Threat
        • QAB1(H)
      • Vars
        • K(b);P-FLIGHT,XP(C)::QAR1(H)
      • Refutation
        • R(a);XP(B)
    • Try
      • Q(H);
      • Vars
        • K(b);OGATEB,P-FLIGHT,XP(C)::QAR1(H)
        • R(a);OGATE,XP(B)::QAB1(H),XR(a)
      • Refutation
        • P(c);XP(C)
  • Actual
    • S(A);
    • Threat
      • S(D)
    • Vars
      • K(b);S_FLIGHT,XP(B)::S(D)
      • R(a);SBLOCK,XP(B)::QAR(H)
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