MESON Chess Problem Database

Problem Display
PID: 186835 (6B1/8/8/3R4/3B4/rq6/k7/1N2QK2 w - - 0 1)

Witt, Andreas

Freie Presse, 2000

(First published on Fri Aug 4 2000)

6B1/8/8/3R4/3B4/rq6/k7/1N2QK2

#2

6 + 3

15391 Problemschach-Jahrbuch (2000) 2001

SOLUTION

  • SOUND
  • Sets
    • 1...Ra5
      • 2.Rxa5#
  • Tries
    • 1.Sc3+?
      • 1...Kb2
        • 2.Qb1#
      • 1...Qxc3!
    • 1.Ra5?
      • threat
        • 2.Rxa3#
      • 1...Qc4+
        • 2.Bxc4#
      • 1...Qf7+
        • 2.Bxf7#
      • 1...Ra4
        • 2.Rxa4#
      • 1...Rxa5!
    • 1.Qd2+?
      • 1...Qc2
        • 2.Qxc2#
      • 1...Qb2
        • 2.Qxb2#
      • 1...Kxb1!
    • 1.Qf2+?
      • 1...Qc2
        • 2.Qxc2#
      • 1...Qb2
        • 2.Qxb2#
      • 1...Kxb1!
    • 1.Qe2+?
      • 1...Qc2
        • 2.Qxc2#
      • 1...Qb2
        • 2.Qxb2#
      • 1...Kxb1!
  • Keys
    • 1.Rb5!
      • 1...Qc4+
        • 2.Qe2#
      • 1...Qf7+
        • 2.Qf2#
      • 1...Qxg8
        • 2.Qd2#
        • 2.Qf2#
        • 2.Qe2#
      • 1...Qd5
        • 2.Qd2#
        • 2.Qf2#
        • 2.Qe2#
      • 1...Qe6
        • 2.Qd2#
        • 2.Qf2#
        • 2.Qe2#
      • 1...Ra4
        • 2.Bxb3#
      • 1...Ra5
        • 2.Bxb3#
        • 2.Rxa5#
      • 1...Ra6
        • 2.Bxb3#
      • 1...Ra7
        • 2.Bxb3#
      • 1...Ra8
        • 2.Bxb3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 1
  • Sets
    • R(b);OGATEB::R(E),XR(b)
  • Tries
    • Try
      • S(A);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR1(B)
      • Refutation
        • Q(c);XS(A)
    • Try
      • R(E);P_PINQ(c),P_PINR(b)
      • Threat
        • R1(E),XR(b)
      • Vars
        • Q(c);CHECK,OGATEB::B(F),XQ(c)
        • R(b);OGATEB::R(E),XR(b)
      • Refutation
        • R(b);N_SPINR(b),XR(E)
    • Try
      • Q(B);CHECK
      • Vars
        • Q(c);N_GUARD,P_SPINQ(c)::QAR2(B),XQ(c)
        • Q(c);N_GUARD,P_SPINQ(c)::QAR1(B),XQ(c)
      • Refutation
        • K(a);S_FLIGHT,XS(A)
    • Try
      • Q(B);CHECK
      • Vars
        • Q(c);N_GUARD,P_SPINQ(c)::QAR2(B),XQ(c)
        • Q(c);N_GUARD,P_SPINQ(c)::QAR1(B),XQ(c)
      • Refutation
        • K(a);S_FLIGHT,XS(A)
    • Try
      • Q(B);CHECK
      • Vars
        • Q(c);N_GUARD,P_SPINQ(c)::QAR2(B),XQ(c)
        • Q(c);N_GUARD,P_SPINQ(c)::QAR1(B),XQ(c)
      • Refutation
        • K(a);S_FLIGHT,XS(A)
  • Actual
    • R(E);P_PINQ(c)
    • Vars
      • Q(c);CHECK::QAR(B)
      • R(b);N_GUARD::B(F),XQ(c)
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