MESON Chess Problem Database

Problem Display
PID: 145272 (1R5R/7Q/8/8/8/5Kp1/7r/6qk w - - 0 1)

Morse, Christopher Jeremy

The Problemist, 1972

1R5R/7Q/8/8/8/5Kp1/7r/6qk

#2

4 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Qb1
      • 2.Rxb1#
      • 2.Qxb1#
  • Tries
    • 1.Qb1?
      • 1...Qd1+
        • 2.Qxd1#
      • 1...Qf1+
        • 2.Qxf1#
      • 1...Qxb1
        • 2.Rxb1#
      • 1...Rxh8
        • 2.Rxh8#
      • 1...Qc1
        • 2.Qxc1#
      • 1...Qe1
        • 2.Qxe1#
      • 1...Rh3
        • 2.Rxh3#
      • 1...Rh4
        • 2.Rxh4#
      • 1...Rh5
        • 2.Rxh5#
      • 1...Rh6
        • 2.Rxh6#
      • 1...Rh7
        • 2.Rxh7#
      • 1...g2!
    • 1.Qxh2+?
      • 1...Qxh2
        • 2.Rb1#
      • 1...gxh2!
  • Keys
    • 1.Rb1!
      • 1...Qd1+
        • 2.Rxd1#
      • 1...Qf1+
        • 2.Rxf1#
      • 1...Qxb1
        • 2.Qxb1#
      • 1...Rxh7
        • 2.Rxh7#
      • 1...Qc1
        • 2.Rxc1#
      • 1...Qe1
        • 2.Rxe1#
      • 1...Rh3
        • 2.Qxh3#
      • 1...Rh4
        • 2.Qxh4#
      • 1...Rh5
        • 2.Qxh5#
      • 1...Rh6
        • 2.Qxh6#
      • 1...g2
        • 2.Qxh2#

This is a version of 145271

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 11
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(B);P_PINQ(a)
      • Vars
        • Q(a);CHECK,OGATEB::QAR(B),XQ(a)
        • Q(a);CHECK,OGATEB::QAR2(B),XQ(a)
        • Q(a);N_SPINQ(a),OGATE,XQ(B)::R(C),XQ(a)
        • R(c);N_SPINR(c),OGATE,XR(D)::R(C),XR(c)
        • Q(a);OGATEB::QAR(B),XQ(a)
        • R(c);OGATEB::R(D),XR(c)
      • Refutation
        • P(d);
    • Try
      • Q(B);CHECK,XR(c)
      • Vars
        • Q(a);P_SPINQ(a),S_CUTP(d),XQ(B)::R(C)
      • Refutation
        • P(d);P_SPINP(d),XQ(B)
  • Actual
    • R(C);P_PINQ(a)
    • Vars
      • Q(a);CHECK,OGATEB::R(C),XQ(a)
      • Q(a);N_SPINQ(a),OGATE,XR(C)::QAR(B),XQ(a)
      • R(c);OGATE,XQ(B)::R(D),XR(c)
      • Q(a);OGATEB::R(C),XQ(a)
      • R(c);OGATEB::QAR2(B),XR(c)
      • R(c);OGATEB::QAR(B),XR(c)
      • P(d);N_GUARD::QAR1(B),XR(c)
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