MESON Chess Problem Database

Problem Display
PID: 270863 (B7/Bq2RK2/1r1ppP2/7p/R1N1k2r/1bn1N1P1/3Q2P1/8 w - - 0 1)

Sachsel, Robert

Schackvarlden, 1940

B7/Bq2RK2/1r1ppP2/7p/R1N1k2r/1bn1N1P1/3Q2P1/8

#2

11 + 9

15601 Albrecht-Leiss-Degener Collection 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Qd5
      • 2.Rxe6#
    • 1...Qc6
      • 2.Rxe6#
    • 1...Qxa8
      • 2.Rxe6#
    • 1...Rb4
      • 2.Qd4#
    • 1...Rb5
      • 2.Qd4#
    • 1...Ra6
      • 2.Qd4#
    • 1...Rc6
      • 2.Qd4#
  • Tries
    • 1.Bxb7+?
      • 1...Rc6
        • 2.Rxe6#
        • 2.Qd4#
      • 1...Rxb7
        • 2.Qd4#
      • 1...Sd5
        • 2.Bxd5#
        • 2.Rxe6#
        • 2.Qxd5#
      • 1...d5!
    • 1.Qxc3?
      • threat
        • 2.Sd2#
        • 2.Sxd6#
      • 1...Bxa4
        • 2.Sd2#
      • 1...Bxc4
        • 2.Rxc4#
      • 1...d5
        • 2.Sd2#
        • 2.Sd6#
      • 1...e5!
  • Keys
    • 1.Kxe6!
      • threat
        • 2.Kf7#
      • 1...Qd5+
        • 2.Kd7#
      • 1...Bxc4+
        • 2.Rxc4#
      • 1...d5+
        • 2.Sd6#
      • 1...Rb5
        • 2.Qd4#
      • 1...Rc6
        • 2.Qd4#
      • 1...Sd5
        • 2.Sxd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • Q(i);N_PINR(I)::R(I),XP(h)
    • Q(i);N_PINR(I),N_SPINQ(i),XB(K)::R(I),XP(h)
    • R(f);::QAR1(A)
    • R(f);N_SPINQ(i)::QAR1(A)
  • Tries
    • Try
      • B(K);CHECK,N_SPINR(I),XQ(i)
      • Vars
        • R(f);P_PINR(I),XB(K)::QAR1(A)
      • Refutation
        • P(g);N_SPINP(h),P_SPINP(g)
    • Try
      • Q(A);XS(b)
      • Threat
        • DUALS(2)
      • Vars
        • B(a);XR(E)::S(F)
        • B(a);OGATE,P_SPINB(a),XS(F)::R(E),XB(a)
      • Refutation
        • P(h);P_PINS(F)
  • Actual
    • K(J);N_SPINR(I),P_SPINS(F),S_FLIGHT,XP(h)
    • Threat
      • R(I)+K(J)
    • Vars
      • Q(i);CHECK,N_PINS(F)::R(I)+K(J)
      • B(a);CHECK,OGATE,P_SPINB(a),XS(F)::R(E),XB(a)
      • P(g);CHECK,N_PINS(F),N_SPINQ(i)::R(E)+S(F),DCHECK
      • R(f);::QAR1(A)
      • R(f);N_SPINQ(i)::QAR1(A)
      • S(b);N_PINS(F),N_SPINQ(i)::R(E)+S(F),DCHECK,XP(g)
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Developed and maintained by Brian Stephenson.
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