MESON Chess Problem Database

Problem Display
PID: 235697 (8/4Q3/r3P1Kb/3Pk3/2B1p3/4p3/4N3/8 w - - 0 1)

Makaronets, Leonid

Mat, 1973

8/4Q3/r3P1Kb/3Pk3/2B1p3/4p3/4N3/8

#2

6 + 5

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Qc7#
    • 1...Ra2
      • 2.Qc7#
    • 1...Ra3
      • 2.Qc7#
    • 1...Ra4
      • 2.Qc7#
    • 1...Ra5
      • 2.Qc7#
    • 1...Rd6
      • 2.Qf6#
    • 1...Rxe6+
      • 2.Qxe6#
    • 1...Ra8
      • 2.Qc7#
  • Keys
    • 1.Qc5!
      • threat
        • 2.d6#
      • 1...Rxe6+
        • 2.dxe6#
      • 1...Ra5
        • 2.Qc7#
      • 1...Rc6
        • 2.dxc6#
      • 1...Rd6
        • 2.Qd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 5
  • Sets
    • R(d);N_GUARD,N_PINP(D)::QAB(F)
    • R(d);SBLOCK::QAB1(F)
    • R(d);CHECK,OGATE,P_SPINR(d),XP(D)::QAR1(F),XR(d)
  • Actual
    • Q(F);
    • Threat
      • QAR(F)+P(C)
    • Vars
      • R(d);CHECK,OGATE,XP(D)::QAR(F)+P(C),XR(d)
      • R(d);N_GUARD,N_PINP(D)::QAB(F)
      • R(d);OGATE::QAR(F)+P(C),XR(d)
      • R(d);SBLOCK::QAB1(F)
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