MESON Chess Problem Database

Problem Display
PID: 93881 (8/8/3QK3/4B3/2p5/2R5/r7/kn6 w - - 0 1)

Scheel, Johan

Casopis ceskoslovenskych sachistu, 1916

8/8/3QK3/4B3/2p5/2R5/r7/kn6

#2

4 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rc2
      • 2.Ra3#
    • 1...Rd2
      • 2.Ra3#
    • 1...Re2
      • 2.Ra3#
    • 1...Rf2
      • 2.Ra3#
    • 1...Rg2
      • 2.Ra3#
    • 1...Rh2
      • 2.Ra3#
    • 1...Ra3
      • 2.Rxa3#
    • 1...Ra4
      • 2.Ra3#
    • 1...Ra5
      • 2.Ra3#
    • 1...Ra6
      • 2.Ra3#
    • 1...Ra7
      • 2.Ra3#
    • 1...Ra8
      • 2.Ra3#
    • 1...Sd2
      • 2.Rc1#
    • 1...Sa3
      • 2.Rc1#
  • Tries
    • 1.Rc1+?
      • 1...Rb2
        • 2.Qa3#
        • 2.Qa6#
      • 1...c3!
    • 1.Qd1?
      • 1...Kb2
        • 2.Rb3#
      • 1...Rc2
        • 2.Ra3#
      • 1...Rd2
        • 2.Ra3#
      • 1...Re2
        • 2.Ra3#
      • 1...Rf2
        • 2.Ra3#
      • 1...Rg2
        • 2.Ra3#
      • 1...Rh2
        • 2.Ra3#
      • 1...Ra3
        • 2.Rxa3#
      • 1...Ra4
        • 2.Ra3#
      • 1...Ra5
        • 2.Ra3#
      • 1...Ra7
        • 2.Ra3#
      • 1...Ra8
        • 2.Ra3#
      • 1...Rb2
        • 2.Ra3#
      • 1...Ra6+!
  • Keys
    • 1.Qa3!
      • 1...Rxa3
        • 2.Rxa3#
      • 1...Sxa3
        • 2.Rc1#
      • 1...Sxc3
        • 2.Qc1#
      • 1...Sd2
        • 2.Rc1#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 11
  • Sets
    • R(c);::B(B)+R(A),DCHECK
    • R(c);P_PINB(B)::B(B)+R(A),DCHECK
    • R(c);::B(B)+R(A),DCHECK,XR(c)
    • R(c);P_PINQ(C)::B(B)+R(A),DCHECK
    • S(b);::B(B)+R(A),DCHECK
  • Tries
    • Try
      • R(A);CHECK,P_PINS(b)
      • Refutation
        • P(d);P_SPINP(d)
    • Try
      • Q(C);P_PINS(b)
      • Vars
        • K(a);N_SPINS(b),S_FLIGHT::B(B)+R(A),DCHECK
        • R(c);::B(B)+R(A),DCHECK
        • R(c);P_PINB(B)::B(B)+R(A),DCHECK
        • R(c);::B(B)+R(A),DCHECK,XR(c)
        • R(c);S_CUTP(d)::R(A)
      • Refutation
        • R(c);CHECK
  • Actual
    • Q(C);P_PINR(c)
    • Vars
      • R(c);N_SPINR(c),OGATE,XQ(C)::B(B)+R(A),DCHECK,XR(c)
      • S(b);N_SPINR(c),XQ(C)::B(B)+R(A),DCHECK
      • S(b);OGATEB,P_SPINS(b),XR(A)::QAR2(C)
      • S(b);::B(B)+R(A),DCHECK
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