MESON Chess Problem Database

Problem Display
PID: 194950 (8/8/8/8/p1Q1K3/p7/rb1R4/1kN5 w - - 0 1)

Mach, Julius Zdenek

Zlata Praha, 1918

8/8/8/8/p1Q1K3/p7/rb1R4/1kN5

#2

4 + 5

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Ka1
      • 2.Qxa2#
    • 1...Ra1
      • 2.Qc2#
    • 1...Bxc1
      • 2.Qxa2#
  • Tries
    • 1.Sxa2?
      • 1...Ba1
        • 2.Qf1#
        • 2.Qd3#
        • 2.Qc1#
        • 2.Qc2#
      • 1...Bc1
        • 2.Qxc1#
      • 1...Bc3
        • 2.Qf1#
      • 1...Bd4
        • 2.Qf1#
        • 2.Qc1#
      • 1...Be5
        • 2.Qf1#
        • 2.Qc1#
      • 1...Bf6
        • 2.Qf1#
        • 2.Qc1#
      • 1...Bg7
        • 2.Qf1#
        • 2.Qc1#
      • 1...Bh8
        • 2.Qf1#
        • 2.Qc1#
      • 1...Ka1!
    • 1.Rc2?
      • 1...Ka1
        • 2.Qxa2#
      • 1...Bxc1
        • 2.Qxa2#
      • 1...Bc3
        • 2.Qxa2#
      • 1...Ba1
        • 2.Qxa2#
      • 1...Bd4
        • 2.Qxa2#
      • 1...Be5
        • 2.Qxa2#
      • 1...Bf6
        • 2.Qxa2#
      • 1...Bg7
        • 2.Qxa2#
      • 1...Bh8
        • 2.Qxa2#
      • 1...Ra1!
    • 1.Qb3?
      • 1...Ka1
        • 2.Qxa2#
      • 1...Kxc1
        • 2.Rd1#
        • 2.Qd1#
        • 2.Qc2#
      • 1...Ra1
        • 2.Qc2#
      • 1...axb3!
    • 1.Qd3+?
      • 1...Kxc1
        • 2.Rd1#
        • 2.Qc2#
      • 1...Ka1!
  • Keys
    • 1.Rd1!
      • 1...Ka1
        • 2.Sb3#
        • 2.Qxa2#
      • 1...Bxc1
        • 2.Qxc1#
      • 1...Bc3
        • 2.Qxa2#
      • 1...Bd4
        • 2.Sd3#
        • 2.Qxa2#
      • 1...Be5
        • 2.Sd3#
        • 2.Qxa2#
      • 1...Bf6
        • 2.Sd3#
        • 2.Qxa2#
      • 1...Bg7
        • 2.Sd3#
        • 2.Qxa2#
      • 1...Bh8
        • 2.Sd3#
        • 2.Qxa2#
      • 1...Ba1
        • 2.Sd3#
        • 2.Qxa2#
      • 1...Ra1
        • 2.Qd3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • K(a);P-FLIGHT::QAR1(C),XR(b)
    • R(b);SBLOCK::QAB1(C)
    • B(c);SBLOCK,XS(A)::QAB1(C),XR(b)
  • Tries
    • Try
      • S(A);XR(b)
      • Vars
        • B(c);N_GUARD::QAR1(C),XB(c)
        • B(c);N_GUARD::QAR(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • R(B);
      • Vars
        • K(a);P-FLIGHT::QAR1(C),XR(b)
        • B(c);XS(A)::QAB1(C),XR(b)
        • B(c);::QAB1(C),XR(b)
      • Refutation
        • R(b);
    • Try
      • Q(C);P_PINB(c)
      • Vars
        • K(a);N_SPINB(c),P-FLIGHT::QAR1(C),XR(b)
        • R(b);SBLOCK::QAB1(C)
      • Refutation
        • P(e);N_SPINB(c),XQ(C)
    • Try
      • Q(C);CHECK
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • R(B);
    • Vars
      • B(c);OGATE,P_SPINB(c),XS(A)::QAR1(C),XB(c)
      • B(c);::QAB1(C),XR(b)
      • R(b);SBLOCK::QAB(C)
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Developed and maintained by Brian Stephenson.
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