MESON Chess Problem Database

Problem Display
PID: 129689 (2B1b3/rP4K1/kp6/3Q4/8/8/8/8 w - - 0 1)

Scheel, Johan

De Maasbode, 1933

2B1b3/rP4K1/kp6/3Q4/8/8/8/8

#2

4 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Ra8
      • 2.bxa8Q#
      • 2.bxa8R#
      • 2.b8Q#
      • 2.b8B#
    • 1...Bd7
      • 2.b8S#
    • 1...Bf7
      • 2.b8S#
  • Tries
    • 1.Qa2+?
      • 1...Ba4
        • 2.Qxa4#
      • 1...Kb5!
  • Keys
    • 1.Bd7!
      • threat
        • 2.b8S#
      • 1...Rxb7
        • 2.Qa2#
      • 1...Ra8
        • 2.bxa8Q#
        • 2.bxa8R#
      • 1...b5
        • 2.Qxb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • B(d);N_PINP(B)::P=S
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • B(d);N_GUARD,P_SPINB(d)::QAR2(A),XB(d)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • B(D);N_SPINP(B)
    • Threat
      • P=S
    • Vars
      • R(c);P_PINB(D),SBLOCK,XP(B)::QAR(A)
      • R(c);OGATE::PXR(c)=Q
      • P(b);::QAB1(A),XP(b)
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