MESON Chess Problem Database

Problem Display
PID: 208804 (8/3p4/3Q4/8/3p4/1p1k1p2/3N4/3K4 w - - 0 1)

Farnsworth, GC

Buffalo Globe, 1876

8/3p4/3Q4/8/3p4/1p1k1p2/3N4/3K4

#2

3 + 5

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...b2
      • 2.Qa3#
    • 1...f2
      • 2.Qg3#
  • Tries
    • 1.Qa3?
      • threat
        • 2.Qxb3#
      • 1...Kc3
        • 2.Qxb3#
      • 1...Ke3!
    • 1.Qg3?
      • threat
        • 2.Qxf3#
      • 1...Ke3
        • 2.Qxf3#
      • 1...Kc3!
    • 1.Qb4?
      • threat
        • 2.Qxb3#
      • 1...b2
        • 2.Qa3#
        • 2.Qb3#
      • 1...Ke3!
    • 1.Qf4?
      • threat
        • 2.Qxf3#
      • 1...f2
        • 2.Qg3#
        • 2.Qf3#
      • 1...Kc3!
    • 1.Qb8?
      • threat
        • 2.Qxb3#
      • 1...Kc3
        • 2.Qxb3#
      • 1...b2
        • 2.Qb3#
      • 1...Ke3!
    • 1.Qf8?
      • threat
        • 2.Qxf3#
      • 1...Ke3
        • 2.Qxf3#
      • 1...f2
        • 2.Qf3#
      • 1...Kc3!
    • 1.Qb6?
      • threat
        • 2.Qxb3#
      • 1...Kc3
        • 2.Qxb3#
      • 1...b2
        • 2.Qb3#
      • 1...Ke3!
    • 1.Qf6?
      • threat
        • 2.Qxf3#
      • 1...Ke3
        • 2.Qxf3#
      • 1...f2
        • 2.Qf3#
      • 1...Kc3!
  • Keys
    • 1.Qd5!
      • threat
        • 2.Qxb3#
        • 2.Qxf3#
      • 1...Kc3
        • 2.Qxb3#
      • 1...Ke3
        • 2.Qxf3#
      • 1...f2
        • 2.Qxb3#
        • 2.Qf3#
      • 1...b2
        • 2.Qb3#
        • 2.Qxf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • P(a);OGATEB::QAR(C)
    • P(c);OGATEB::QAR(C)
  • Tries
    • Try
      • Q(C);N_PINP(d),P_PINP(a)
      • Threat
        • QAR2(C),XP(a)
      • Vars
        • K(b);P-FLIGHT::QAR1(C),XP(a)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(C);N_PINP(d),P_PINP(c)
      • Threat
        • QAR2(C),XP(c)
      • Vars
        • K(b);P-FLIGHT::QAR1(C),XP(c)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(C);N_PINP(d)
      • Threat
        • QAR2(C),XP(a)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(C);N_PINP(d)
      • Threat
        • QAR2(C),XP(c)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(C);N_PINP(d)
      • Threat
        • QAR2(C),XP(a)
      • Vars
        • K(b);P-FLIGHT::QAR1(C),XP(a)
        • P(a);::QAR2(C)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(C);N_PINP(d)
      • Threat
        • QAR2(C),XP(c)
      • Vars
        • K(b);P-FLIGHT::QAR1(C),XP(c)
        • P(c);::QAR2(C)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(C);N_PINP(d)
      • Threat
        • QAR2(C),XP(a)
      • Vars
        • K(b);P-FLIGHT::QAR1(C),XP(a)
        • P(a);::QAR2(C)
      • Refutation
        • K(b);P-FLIGHT,P_SPINP(d)
    • Try
      • Q(C);N_PINP(d)
      • Threat
        • QAR2(C),XP(c)
      • Vars
        • K(b);P-FLIGHT::QAR1(C),XP(c)
        • P(c);::QAR2(C)
      • Refutation
        • K(b);P-FLIGHT,P_SPINP(d)
  • Actual
    • Q(C);
    • Threat
      • DUALS(2)
    • Vars
      • K(b);N_SPINP(d),P-FLIGHT::QAR1(C),XP(a)
      • K(b);N_SPINP(d),P-FLIGHT::QAR1(C),XP(c)
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