MESON Chess Problem Database

Problem Display
PID: 206260 (8/8/8/8/8/2Q2Kp1/PP5b/r4k2 w - - 0 1)

Eighch, Eustace

Schackvarlden, 1925

8/8/8/8/8/2Q2Kp1/PP5b/r4k2

#2

4 + 4

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rc1
      • 2.Qxc1#
    • 1...Rxa2
      • 2.Qc1#
  • Tries
    • 1.Qd2?
      • 1...Kg1
        • 2.Qg2#
      • 1...Rxa2
        • 2.Qc1#
        • 2.Qd1#
      • 1...Rc1
        • 2.Qxc1#
      • 1...Rd1
        • 2.Qxd1#
      • 1...Re1
        • 2.Qg2#
      • 1...Bg1
        • 2.Qe2#
      • 1...g2
        • 2.Qf2#
      • 1...Rb1!
    • 1.Qd3+?
      • 1...Ke1
        • 2.Qe2#
      • 1...Kg1!
    • 1.Qc4+?
      • 1...Ke1
        • 2.Qe2#
      • 1...Kg1!
  • Keys
    • 1.Qc2!
      • 1...Ke1
        • 2.Qe2#
      • 1...Kg1
        • 2.Qg2#
      • 1...Rxa2
        • 2.Qb1#
        • 2.Qd1#
        • 2.Qc1#
      • 1...Rb1
        • 2.Qxb1#
      • 1...Rc1
        • 2.Qxc1#
      • 1...Rd1
        • 2.Qxd1#
      • 1...Re1
        • 2.Qg2#
      • 1...Bg1
        • 2.Qe2#
      • 1...g2
        • 2.Qf2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 1
  • Sets
    • R(a);N_GUARD::QAR(C),XR(a)
    • R(a);N_GUARD,XP(A)::QAR(C)
  • Tries
    • Try
      • Q(C);
      • Vars
        • K(b);P-FLIGHT::QAR1(C)
        • R(a);N_GUARD::QAR(C),XR(a)
        • R(a);N_GUARD::QAR2(C),XR(a)
        • R(a);SBLOCK::QAB1(C)
        • B(c);SBLOCK::QAB1(C)
        • P(d);N_GUARD::QAR1(C)
      • Refutation
        • R(a);
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(C)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(C)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • Q(C);
    • Vars
      • K(b);P-FLIGHT::QAR1(C)
      • R(a);N_GUARD::QAR(C),XR(a)
      • R(a);N_GUARD::QAR2(C),XR(a)
      • R(a);SBLOCK::QAB1(C)
      • B(c);SBLOCK::QAB1(C)
      • P(d);N_GUARD::QAR1(C)
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