MESON Chess Problem Database

Problem Display
PID: 221358 (8/1R6/2p1p3/4P3/2k1P3/1p6/2rPK3/2R3Q1 w - - 0 1)

Henning, Hans

Funkschach, 1926

8/1R6/2p1p3/4P3/2k1P3/1p6/2rPK3/2R3Q1

#2

7 + 5

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rc3
      • 2.Rxc3#
      • 2.d3#
    • 1...b2
      • 2.Rxc2#
  • Tries
    • 1.Qe3?
      • 1...Rc3
        • 2.Rxc3#
        • 2.Qxc3#
        • 2.d3#
      • 1...b2
        • 2.Rxc2#
      • 1...c5
        • 2.Qd3#
      • 1...Rxc1!
    • 1.Qa7?
      • 1...c5
        • 2.Qa4#
      • 1...Rc3
        • 2.Rxc3#
        • 2.d3#
      • 1...b2
        • 2.Rxc2#
      • 1...Rxc1!
  • Keys
    • 1.Ke3!
      • 1...Rc3+
        • 2.Rxc3#
      • 1...Kc5
        • 2.Kd3#
      • 1...Rxc1
        • 2.Qxc1#
      • 1...b2
        • 2.Rxc2#
      • 1...c5
        • 2.Qf1#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • P(b);N_GUARD::R(A),XR(a)
  • Tries
    • Try
      • Q(B);
      • Vars
        • P(b);N_GUARD::R(A),XR(a)
        • P(d);SBLOCK::QAB1(B)
      • Refutation
        • R(a);N_PINP(C),N_SPINR(a),XR(A)
    • Try
      • Q(B);
      • Vars
        • P(d);SBLOCK::QAR2(B)
        • P(b);N_GUARD::R(A),XR(a)
      • Refutation
        • R(a);N_PINP(C),N_SPINR(a),XR(A)
  • Actual
    • K(D);N_SPINP(C),P-FLIGHT
    • Vars
      • R(a);CHECK,OGATE::R1(A),XR(a)
      • K(c);P-FLIGHT::QAB(B)+K(D)
      • R(a);N_SPINR(a),OGATE,XR(A)::QAR(B),XR(a)
      • P(b);N_GUARD::R(A),XR(a)
      • P(d);SBLOCK::QAB(B)
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