MESON Chess Problem Database

Problem Display
PID: 218590 (8/8/3B4/3p1Q2/2k2n2/5R2/2nK4/8 w - - 0 1)

Arnold, William E

Newark Sunday Call, 1882

8/8/3B4/3p1Q2/2k2n2/5R2/2nK4/8

#2

4 + 4

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4
      • 2.Rxf4#
      • 2.Qxf4#
    • 1...Se2
      • 2.Qd3#
    • 1...Sg2
      • 2.Qd3#
    • 1...Sd3
      • 2.Qxd3#
    • 1...Sh3
      • 2.Qd3#
    • 1...Sh5
      • 2.Qd3#
    • 1...Se6
      • 2.Qd3#
    • 1...Sg6
      • 2.Qd3#
    • 1...d4
      • 2.Qc5#
  • Tries
    • 1.Kxc2?
      • 1...Kd4
        • 2.Qxf4#
      • 1...Se2
        • 2.Qd3#
      • 1...Sg2
        • 2.Qd3#
      • 1...Sd3
        • 2.Qxd3#
      • 1...Sh3
        • 2.Qd3#
      • 1...Sh5
        • 2.Qd3#
      • 1...Se6
        • 2.Qd3#
      • 1...Sg6
        • 2.Qd3#
      • 1...d4
        • 2.Qc5#
      • 1...Kb5!
    • 1.Rc3+?
      • 1...Kd4
        • 2.Bc5#
        • 2.Be5#
        • 2.Qxf4#
        • 2.Qe5#
      • 1...Kb5!
    • 1.Qxc2+?
      • 1...Kd4
        • 2.Rxf4#
        • 2.Qa4#
      • 1...Kb5!
    • 1.Qc8+?
      • 1...Kd4
        • 2.Rxf4#
      • 1...Kb5!
  • Keys
    • 1.Rb3!
      • 1...Kxb3
        • 2.Qxc2#
      • 1...Kd4
        • 2.Qxf4#
      • 1...Sb4
        • 2.Rxb4#
      • 1...Sa1
        • 2.Rb4#
      • 1...Se1
        • 2.Rb4#
      • 1...Sa3
        • 2.Rb4#
      • 1...Se3
        • 2.Rb4#
      • 1...Sd4
        • 2.Rb4#
      • 1...Se2
        • 2.Qd3#
      • 1...Sg2
        • 2.Qd3#
      • 1...Sd3
        • 2.Qxd3#
      • 1...Sh3
        • 2.Qd3#
      • 1...Sh5
        • 2.Qd3#
      • 1...Se6
        • 2.Qd3#
      • 1...Sg6
        • 2.Qd3#
      • 1...d4
        • 2.Qb5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
    • S(c);N_GUARD::QAB1(C)
    • S(c);N_GUARD::QAB1(C),XS(c)
    • P(d);OGATE::QAR1(C)
  • Tries
    • Try
      • K(A);P-FLIGHT,XS(a)
      • Vars
        • K(b);P-FLIGHT::QAR2(C),XS(c)
        • S(c);N_GUARD::QAB1(C)
        • S(c);N_GUARD::QAB1(C),XS(c)
        • P(d);OGATE::QAR1(C)
      • Refutation
        • K(b);P_SPINP(d),S_FLIGHT
    • Try
      • R(B);CHECK
      • Refutation
        • K(b);P_SPINP(d),S_FLIGHT
    • Try
      • Q(C);CHECK,XS(a)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);P-FLIGHT::R(B),XS(c)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • R(B);
    • Vars
      • K(b);S_FLIGHT,XR(B)::QAB1(C),XS(a)
      • K(b);P-FLIGHT::QAR2(C),XS(c)
      • S(a);N_GUARD::R1(B),XS(a)
      • S(a);N_GUARD::R1(B)
      • S(a);N_GUARD,SBLOCK::R1(B)
      • S(c);N_GUARD::QAB1(C)
      • S(c);N_GUARD::QAB1(C),XS(c)
      • P(d);OGATE,SBLOCK::QAB1(C)
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