MESON Chess Problem Database

Problem Display
PID: 246479 (kr6/r7/2NK4/8/4Q3/8/6B1/8 w - - 0 1)

Speckmann, Werner

Europe Echecs, 1966

kr6/r7/2NK4/8/4Q3/8/6B1/8

#2

4 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Sb4+?
      • 1...Rbb7
        • 2.Qe8#
      • 1...Rab7!
    • 1.Sd4+?
      • 1...Rbb7
        • 2.Qe8#
      • 1...Rab7!
    • 1.Sa5+?
      • 1...Rbb7
        • 2.Qe8#
      • 1...Rab7!
    • 1.Se5+?
      • 1...Rab7
        • 2.Qa4#
      • 1...Rbb7!
    • 1.Sxa7+?
      • 1...Rb7
        • 2.Qxb7#
      • 1...Kxa7!
    • 1.Se7+?
      • 1...Rab7
        • 2.Qa4#
      • 1...Rbb7!
    • 1.Sd8+?
      • 1...Rab7
        • 2.Qa4#
      • 1...Rbb7!
  • Keys
    • 1.Sxb8+!
      • 1...Kxb8
        • 2.Qe8#
      • 1...Rb7
        • 2.Qxb7#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • R(c);P_SPINR(c),S_CUTR(a)::QAR(B)
      • Refutation
        • R(a);P_SPINR(a)
    • Try
      • S(C);CHECK
      • Vars
        • R(c);P_SPINR(c),S_CUTR(a)::QAR(B)
      • Refutation
        • R(a);P_SPINR(a)
    • Try
      • S(C);CHECK
      • Vars
        • R(c);P_SPINR(c),S_CUTR(a)::QAR(B)
      • Refutation
        • R(a);P_SPINR(a)
    • Try
      • S(C);CHECK
      • Vars
        • R(a);P_SPINR(a),S_CUTR(c)::QAR(B)
      • Refutation
        • R(c);P_SPINR(c)
    • Try
      • S(C);CHECK,XR(a)
      • Vars
        • R(c);N_GUARD,P_SPINR(c)::QAB1(B),XR(c)
      • Refutation
        • K(b);P-FLIGHT,XS(C)
    • Try
      • S(C);CHECK
      • Vars
        • R(a);P_SPINR(a),S_CUTR(c)::QAR(B)
      • Refutation
        • R(c);P_SPINR(c)
    • Try
      • S(C);CHECK
      • Vars
        • R(a);P_SPINR(a),S_CUTR(c)::QAR(B)
      • Refutation
        • R(c);P_SPINR(c)
  • Actual
    • S(C);CHECK,XR(c)
    • Vars
      • K(b);P-FLIGHT,XS(C)::QAR(B)
      • R(a);N_GUARD,P_SPINR(a)::QAB1(B),XR(a)
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