MESON Chess Problem Database

Problem Display
PID: 148721 (8/8/8/8/1NK1B3/rPn5/1R4Q1/k7 w - - 0 1)

Palkoska, Emil

Checkmate, 1903

8/8/8/8/1NK1B3/rPn5/1R4Q1/k7

#2

6 + 3

14868 Pirnie Collection 2013

SOLUTION

  • SOUND
  • Sets
    • 1...Sb1
      • 2.Rxb1#
    • 1...Sd1
      • 2.Rb1#
    • 1...Sa2
      • 2.Rb1#
    • 1...Se2
      • 2.Rb1#
    • 1...Sa4
      • 2.Rb1#
    • 1...Sb5
      • 2.Rb1#
    • 1...Sd5
      • 2.Rb1#
  • Tries
    • 1.Qf1+?
      • 1...Sb1
        • 2.Rxb1#
        • 2.Qxb1#
      • 1...Sd1
        • 2.Rb1#
      • 1...Kxb2!
    • 1.Qh1+?
      • 1...Sb1
        • 2.Rxb1#
        • 2.Qxb1#
      • 1...Sd1
        • 2.Rb1#
      • 1...Kxb2!
    • 1.Qg1+?
      • 1...Sb1
        • 2.Rxb1#
        • 2.Qxb1#
      • 1...Sd1
        • 2.Rb1#
      • 1...Kxb2!
  • Keys
    • 1.Qg7!
      • threat
        • 2.Rb1#
      • 1...Kxb2
        • 2.Qxc3#
      • 1...Rxb3
        • 2.Ra2#
      • 1...Sxe4
        • 2.Sc2#
      • 1...Sb1
        • 2.Sc2#
        • 2.Rxb1#
        • 2.Ra2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 7
  • Sets
    • S(c);N_GUARD::R1(A),XS(c)
    • S(c);N_GUARD::R1(A)
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • S(c);N_GUARD,P_SPINS(c)::R1(A)
      • Refutation
        • K(a);S_FLIGHT,XR(A)
    • Try
      • Q(B);CHECK
      • Vars
        • S(c);N_GUARD,P_SPINS(c)::R1(A)
      • Refutation
        • K(a);S_FLIGHT,XR(A)
    • Try
      • Q(B);CHECK
      • Vars
        • S(c);N_GUARD,P_SPINS(c)::R1(A)
      • Refutation
        • K(a);S_FLIGHT,XR(A)
  • Actual
    • Q(B);
    • Threat
      • R1(A)
    • Vars
      • K(a);OGATEB,P_SPINS(c),S_FLIGHT,XR(A)::QAB1(B),XS(c)
      • R(b);N_GUARD,XP(C)::R1(A)
      • S(c);XB(F)::S(D)
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