MESON Chess Problem Database

Problem Display
PID: 224473 (8/5B2/p4p2/1p3k2/8/5K2/3P1P2/R4Q2 w - - 0 1)

Patrick, IJ

Philadelphia Times, 1888

8/5B2/p4p2/1p3k2/8/5K2/3P1P2/R4Q2

#2

6 + 4

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...b4
      • 2.Ra5#
    • 1...a5
      • 2.Qxb5#
  • Tries
    • 1.Qe2?
      • 1...b4
        • 2.Ra5#
      • 1...a5
        • 2.Qxb5#
      • 1...Kg5!
    • 1.Qd3+?
      • 1...Ke5
        • 2.Re1#
        • 2.Qd5#
      • 1...Kg5!
    • 1.Qh3+?
      • 1...Kg5
        • 2.Rg1#
        • 2.Qh5#
      • 1...Ke5!
    • 1.Qc1?
      • threat
        • 2.Qc5#
      • 1...Ke5
        • 2.Qc5#
      • 1...Kg5!
    • 1.Qh1?
      • threat
        • 2.Qh5#
      • 1...Kg5
        • 2.Qh5#
      • 1...Ke5!
    • 1.d4?
      • 1...a5
        • 2.Qxb5#
      • 1...b4
        • 2.Ra5#
      • 1...Kg5!
  • Keys
    • 1.Qc4!
      • threat
        • 2.Qd5#
        • 2.Qf4#
        • 2.Qc5#
      • 1...Ke5
        • 2.Qd5#
        • 2.Qf4#
        • 2.Qc5#
      • 1...Kg5
        • 2.Qf4#
      • 1...bxc4
        • 2.Ra5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • P(a);OGATEB::R(A)
    • P(c);N_GUARD::QAR(B),XP(a)
  • Tries
    • Try
      • Q(B);
      • Vars
        • P(a);OGATEB::R(A)
        • P(c);N_GUARD::QAR(B),XP(a)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(B);CHECK
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(B);CHECK
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(B);
      • Threat
        • QAR(B)
      • Vars
        • K(b);P-FLIGHT::QAR2(B)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(B);
      • Threat
        • QAR2(B)
      • Vars
        • K(b);P-FLIGHT::QAR1(B)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • P(C);
      • Vars
        • P(c);N_GUARD::QAR(B),XP(a)
        • P(a);OGATEB::R(A)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • Q(B);
    • Threat
      • DUALS(3)
    • Vars
      • K(b);P-FLIGHT::QAB1(B)
      • P(a);OGATEB,XQ(B)::R(A)
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