MESON Chess Problem Database

Problem Display
PID: 215515 (1rb5/3p4/nR6/k7/2KQ4/1P6/8/8 w - - 0 1)

Wastl, Rudolf

Funkschach, 1926

1rb5/3p4/nR6/k7/2KQ4/1P6/8/8

#2

4 + 5

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rxb6
      • 2.Qa1#
    • 1...Ra8
      • 2.Rb5#
    • 1...Bb7
      • 2.Rb5#
    • 1...Sb4
      • 2.Qc5#
    • 1...Sc5
      • 2.Qxc5#
  • Tries
    • 1.Qc3+?
      • 1...Sb4
        • 2.Qxb4#
      • 1...Kxb6!
    • 1.Qd2+?
      • 1...Sb4
        • 2.Qxb4#
      • 1...Kxb6!
    • 1.Qd5+?
      • 1...Sc5
        • 2.Qxc5#
      • 1...Kxb6!
    • 1.b4+?
      • 1...Ka4
        • 2.Qa1#
      • 1...Sxb4!
  • Keys
    • 1.Qd6!
      • 1...Rxb6
        • 2.Qa3#
      • 1...Rb7
        • 2.Rxa6#
      • 1...Ra8
        • 2.Rb5#
      • 1...Bb7
        • 2.Rb5#
      • 1...Sb4
        • 2.Qxb4#
        • 2.Qc5#
      • 1...Sc5
        • 2.Qxc5#
      • 1...Sc7
        • 2.Qb4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • R(d);SBLOCK,XR(D)::QAR(C)
    • R(d);N_GUARD::R1(D)
    • B(e);S_CUTR(d)::R1(D)
    • S(b);N_GUARD::QAR2(C)
    • S(b);N_GUARD::QAR2(C),XS(b)
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • S(b);N_GUARD,P_SPINS(b)::QAB1(C),XS(b)
      • Refutation
        • K(a);S_FLIGHT,XR(D)
    • Try
      • Q(C);CHECK
      • Vars
        • S(b);N_GUARD,P_SPINS(b)::QAB1(C),XS(b)
      • Refutation
        • K(a);S_FLIGHT,XR(D)
    • Try
      • Q(C);CHECK
      • Vars
        • S(b);N_GUARD,P_SPINS(b)::QAR2(C),XS(b)
      • Refutation
        • K(a);S_FLIGHT,XR(D)
    • Try
      • P(A);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR(C)
      • Refutation
        • S(b);XP(A)
  • Actual
    • Q(C);
    • Vars
      • R(d);SBLOCK,XR(D)::QAR2(C)
      • R(d);S_CUTB(e)::R1(D),XS(b)
      • R(d);N_GUARD::R1(D)
      • B(e);S_CUTR(d)::R1(D)
      • S(b);N_GUARD::QAR2(C),XS(b)
      • S(b);N_GUARD::QAB1(C)
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