MESON Chess Problem Database

Problem Display
PID: 201351 (b7/2p5/2k5/3R4/1Q2K3/n7/8/8 w - - 0 1)

Bernard, Henry D'Oyly

Chess Amateur (The), 1922

b7/2p5/2k5/3R4/1Q2K3/n7/8/8

#2

3 + 4

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Bb7
      • 2.Qc5#
    • 1...Sb1
      • 2.Qb5#
    • 1...Sc2
      • 2.Qb5#
    • 1...Sc4
      • 2.Qb5#
    • 1...Sb5
      • 2.Qxb5#
  • Tries
    • 1.Kd3?
      • 1...Sb5
        • 2.Qxb5#
      • 1...Bb7
        • 2.Qc5#
      • 1...Sb1
        • 2.Qb5#
      • 1...Sc2
        • 2.Qb5#
      • 1...Sc4
        • 2.Qb5#
      • 1...Kxd5!
    • 1.Kf3?
      • 1...Sb5
        • 2.Qxb5#
      • 1...Bb7
        • 2.Qc5#
      • 1...Sb1
        • 2.Qb5#
      • 1...Sc2
        • 2.Qb5#
      • 1...Sc4
        • 2.Qb5#
      • 1...Kxd5!
    • 1.Kd4?
      • 1...Sb5+
        • 2.Qxb5#
      • 1...Bb7
        • 2.Qc5#
      • 1...Sb1
        • 2.Qb5#
      • 1...Sc4
        • 2.Qb5#
      • 1...Sc2+!
    • 1.Kf4?
      • 1...Sb5
        • 2.Qxb5#
      • 1...Bb7
        • 2.Qc5#
      • 1...Sb1
        • 2.Qb5#
      • 1...Sc2
        • 2.Qb5#
      • 1...Sc4
        • 2.Qb5#
      • 1...Kxd5!
    • 1.Ke5?
      • 1...Sb5
        • 2.Qxb5#
      • 1...Bb7
        • 2.Qc5#
      • 1...Sb1
        • 2.Qb5#
      • 1...Sc2
        • 2.Qb5#
      • 1...Sc4+!
    • 1.Kf5?
      • 1...Sb5
        • 2.Qxb5#
      • 1...Bb7
        • 2.Qc5#
      • 1...Sb1
        • 2.Qb5#
      • 1...Sc2
        • 2.Qb5#
      • 1...Sc4
        • 2.Qb5#
      • 1...Kxd5!
    • 1.Qa5?
      • threat
        • 2.Qa6#
      • 1...Bb7
        • 2.Qc5#
      • 1...Sc4
        • 2.Qb5#
      • 1...Kb7!
    • 1.Qb3?
      • 1...Sb5
        • 2.Qxb5#
      • 1...Sb1
        • 2.Qb5#
      • 1...Sc2
        • 2.Qb5#
      • 1...Sc4
        • 2.Qb5#
      • 1...Bb7!
    • 1.Qb8?
      • 1...Sb1
        • 2.Qb5#
      • 1...Sc2
        • 2.Qb5#
      • 1...Sc4
        • 2.Qb5#
      • 1...Sb5
        • 2.Qxb5#
      • 1...Bb7!
  • Keys
    • 1.Qb2!
      • 1...Sb5
        • 2.Qxb5#
      • 1...Bb7
        • 2.Qf6#
      • 1...Sb1
        • 2.Qb5#
      • 1...Sc2
        • 2.Qb5#
      • 1...Sc4
        • 2.Qb5#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • B(d);SBLOCK::QAR1(A)
    • S(a);N_GUARD::QAB1(A)
    • S(a);N_GUARD::QAB1(A),XS(a)
  • Tries
    • Try
      • K(B);S_FLIGHT
      • Vars
        • S(a);N_GUARD::QAB1(A),XS(a)
        • B(d);SBLOCK::QAR1(A)
        • S(a);N_GUARD::QAB1(A)
      • Refutation
        • K(b);S_FLIGHT,XR(C)
    • Try
      • K(B);S_FLIGHT
      • Vars
        • S(a);N_GUARD::QAB1(A),XS(a)
        • B(d);SBLOCK::QAR1(A)
        • S(a);N_GUARD::QAB1(A)
      • Refutation
        • K(b);S_FLIGHT,XR(C)
    • Try
      • K(B);P-FLIGHT
      • Vars
        • S(a);CHECK,N_GUARD::QAB1(A),XS(a)
        • B(d);SBLOCK::QAR1(A)
        • S(a);N_GUARD::QAB1(A)
      • Refutation
        • S(a);CHECK
    • Try
      • K(B);P-FLIGHT
      • Vars
        • S(a);N_GUARD::QAB1(A),XS(a)
        • B(d);SBLOCK::QAR1(A)
        • S(a);N_GUARD::QAB1(A)
      • Refutation
        • K(b);S_FLIGHT,XR(C)
    • Try
      • K(B);P-FLIGHT
      • Vars
        • S(a);N_GUARD::QAB1(A),XS(a)
        • B(d);SBLOCK::QAR1(A)
        • S(a);N_GUARD::QAB1(A)
      • Refutation
        • S(a);CHECK
    • Try
      • K(B);S_FLIGHT
      • Vars
        • S(a);N_GUARD::QAB1(A),XS(a)
        • B(d);SBLOCK::QAR1(A)
        • S(a);N_GUARD::QAB1(A)
      • Refutation
        • K(b);S_FLIGHT,XR(C)
    • Try
      • Q(A);
      • Threat
        • QAR2(A)
      • Vars
        • B(d);SBLOCK::QAR1(A)
        • S(a);N_GUARD::QAB1(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • S(a);N_GUARD::QAB1(A),XS(a)
        • S(a);N_GUARD::QAB1(A)
      • Refutation
        • B(d);
    • Try
      • Q(A);
      • Vars
        • S(a);N_GUARD::QAB1(A)
        • S(a);N_GUARD::QAB1(A),XS(a)
      • Refutation
        • B(d);
  • Actual
    • Q(A);
    • Vars
      • S(a);N_GUARD::QAB1(A),XS(a)
      • B(d);SBLOCK::QAR(A)
      • S(a);N_GUARD::QAB1(A)
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