MESON Chess Problem Database

Problem Display
PID: 184786 (8/8/8/8/8/Q1R3K1/1p1kp1p1/br1rNbn1 w - - 0 1)

Smutny, Jan

Otavan, 1908

8/8/8/8/8/Q1R3K1/1p1kp1p1/br1rNbn1

#2

4 + 9

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Sf3
      • 2.Sxf3#
    • 1...Sh3
      • 2.Sf3#
  • Tries
    • 1.Rd3+?
      • 1...Kc1
        • 2.Qc5#
        • 2.Qc3#
      • 1...Kxe1!
    • 1.Qa5?
      • 1...Kxe1
        • 2.Rc1#
      • 1...Rdc1
        • 2.Rd3#
      • 1...Rbc1
        • 2.Rd3#
      • 1...Sf3
        • 2.Sxf3#
      • 1...Sh3
        • 2.Sf3#
      • 1...Rxe1!
  • Keys
    • 1.Qb4!
      • 1...Kxe1
        • 2.Rc1#
      • 1...Rxe1
        • 2.Qd4#
      • 1...Rdc1
        • 2.Rd3#
      • 1...Rbc1
        • 2.Rd3#
      • 1...Sf3
        • 2.Sxf3#
      • 1...Sh3
        • 2.Sf3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • S(e);N_GUARD::S(A),XS(e)
    • S(e);N_GUARD::S(A)
  • Tries
    • Try
      • R(C);CHECK
      • Refutation
        • K(g);S_FLIGHT,XS(A)
    • Try
      • Q(B);
      • Vars
        • K(g);S_FLIGHT,XS(A)::QAB(B)+R(C)
        • R(c);SBLOCK::QAB(B)+R(C),DCHECK
        • R(b);SBLOCK::QAB(B)+R(C),DCHECK
        • S(e);N_GUARD::S(A),XS(e)
        • S(e);N_GUARD::S(A)
      • Refutation
        • R(c);XS(A)
  • Actual
    • Q(B);
    • Vars
      • K(g);S_FLIGHT,XS(A)::QAB(B)+R(C)
      • R(c);SBLOCK,XS(A)::QAR2(B)
      • R(c);SBLOCK::QAB(B)+R(C),DCHECK
      • R(b);SBLOCK::QAB(B)+R(C),DCHECK
      • S(e);N_GUARD::S(A),XS(e)
      • S(e);N_GUARD::S(A)
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