MESON Chess Problem Database

Problem Display
PID: 121425 (R7/bk6/2Rp4/p7/8/8/2Q5/1K6 w - - 0 1)

Cumpe, Josef

Bohemia, 1907

R7/bk6/2Rp4/p7/8/8/2Q5/1K6

#2

4 + 4

6490 yacpdb 2009
5454 Near Snap 2013

SOLUTION

  • SOUND
  • Tries
    • 1.Rb6+?
      • 1...Kxa8
        • 2.Qc6#
      • 1...Bxb6
        • 2.Qc8#
      • 1...Kxb6!
    • 1.Rc7+?
      • 1...Ka6
        • 2.Qc6#
      • 1...Kb6
        • 2.Qc6#
      • 1...Kxa8!
    • 1.Rcc8?
      • threat
        • 2.Qc6#
      • 1...Ka6
        • 2.Qc6#
      • 1...Kb6
        • 2.Qc6#
      • 1...Bc5!
  • Keys
    • 1.Ra6!
      • threat
        • 2.Qc6#
        • 2.Qc8#
      • 1...Kxa6
        • 2.Qc6#
      • 1...Kxa8
        • 2.Qc8#
      • 1...Bc5
        • 2.Qh7#
      • 1...Bb6
        • 2.Qc8#
      • 1...Bb8
        • 2.Qc6#

Anticipated by 121008(0000)

This anticipates 16680(1942), 107158(1966)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(C);CHECK
      • Vars
        • K(d);S_FLIGHT,XR(D)::QAB(B)
        • B(c);SBLOCK,XR(C)::QAB1(B)
      • Refutation
        • K(d);P-FLIGHT,XR(C)
    • Try
      • R(C);CHECK
      • Vars
        • K(d);P_SPINB(c),S_FLIGHT::QAR2(B)
        • K(d);P-FLIGHT::QAR1(B)
      • Refutation
        • K(d);S_FLIGHT,XR(D)
    • Try
      • R(C);
      • Threat
        • QAB1(B)
      • Vars
        • K(d);P_SPINB(c),S_FLIGHT::QAR2(B)
        • K(d);P-FLIGHT::QAR1(B)
      • Refutation
        • B(c);
  • Actual
    • R(C);
    • Threat
      • DUALS(2)
    • Vars
      • K(d);P_SPINB(c),S_FLIGHT,XR(C)::QAR2(B)
      • K(d);P_SPINB(c),S_FLIGHT,XR(D)::QAR2(B)
      • B(c);::QAR(B)
      • B(c);::QAB1(B)
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