MESON Chess Problem Database

Problem Display
PID: 163034 (1R6/8/8/8/1N6/1k1p4/1P4Q1/3K4 w - - 0 1)

Rimkus, Mecislovas

StrateGems, 2013

1R6/8/8/8/1N6/1k1p4/1P4Q1/3K4

#2

5 + 2

SOLUTION

  • SOUND
  • Sets
    • 1...Kc4
      • 2.Qd5#
  • Tries
    • 1.Sc2+?
      • 1...Ka4
        • 2.Qa8#
      • 1...Kc4
        • 2.Qc6#
      • 1...Ka2!
    • 1.Sxd3+?
      • 1...Ka4
        • 2.Qa8#
      • 1...Kc4
        • 2.Qe4#
      • 1...Ka2!
    • 1.Qe4?
      • 1...Ka4
        • 2.Sc6#
      • 1...d2
        • 2.Qc2#
      • 1...Kxb2!
    • 1.Qd5+?
      • 1...Ka4
        • 2.Qa2#
      • 1...Kxb2!
    • 1.Qc6?
      • 1...d2
        • 2.Qc2#
      • 1...Kxb2!
    • 1.Qd2?
      • 1...Kc4
        • 2.Qc3#
      • 1...Ka4!
    • 1.Qg8+?
      • 1...Ka4
        • 2.Qa2#
      • 1...Kxb2!
  • Keys
    • 1.Qa8!
      • threat
        • 2.Qa2#
      • 1...Kxb2
        • 2.Sd5#
      • 1...Kc4
        • 2.Qd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::QAB1(C)
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • K(a);S_FLIGHT::QAR(C)
        • K(a);S_FLIGHT::QAR2(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(D);CHECK,XP(b)
      • Vars
        • K(a);S_FLIGHT::QAR(C)
        • K(a);S_FLIGHT::QAR2(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(C);
      • Vars
        • K(a);S_FLIGHT::QAR(C)+S(D)
        • P(b);OGATE::QAB1(C)
      • Refutation
        • K(a);P-FLIGHT,XP(B)
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAR2(C)
      • Refutation
        • K(a);P-FLIGHT,XP(B)
    • Try
      • Q(C);
      • Vars
        • P(b);N_GUARD::QAB1(C)
      • Refutation
        • K(a);P-FLIGHT,XP(B)
    • Try
      • Q(C);
      • Vars
        • K(a);S_FLIGHT::QAR1(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAR2(C)
      • Refutation
        • K(a);P-FLIGHT,XP(B)
  • Actual
    • Q(C);
    • Threat
      • QAB1(C)
    • Vars
      • K(a);P-FLIGHT,XP(B)::R(E)+S(D)
      • K(a);S_FLIGHT::QAB1(C)
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