MESON Chess Problem Database

Problem Display
PID: 80536 (bBn5/2q5/8/2pkp1Rr/Bp1PRQ2/2p4p/2N2N2/7K w - - 0 1)

Marysko, Milos

4th HM., Rjazansky komsomolets, 1981

bBn5/2q5/8/2pkp1Rr/Bp1PRQ2/2p4p/2N2N2/7K

#2

9 + 10

6424 Czech Album (1979-1981) 1986

SOLUTION

  • SOUND
  • Sets
    • 1...Kc4
      • 2.Se3#
    • 1...Kd6
      • 2.Qxe5#
    • 1...Qa5
      • 2.Qf7#
    • 1...Qd8
      • 2.Qf7#
    • 1...Qf7
      • 2.Qxf7#
  • Tries
    • 1.Se3+?
      • 1...Kd6
        • 2.Qxe5#
        • 2.Qf6#
      • 1...Ke6!
    • 1.Qxe5+?
      • 1...Kc4
        • 2.Se3#
        • 2.d5#
      • 1...Qxe5!
    • 1.Qf6?
      • threat
        • 2.Se3#
      • 1...Kc4
        • 2.Se3#
      • 1...cxd4!
    • 1.Qf7+?
      • 1...Kd6
        • 2.Bxc7#
        • 2.Rg6#
        • 2.Qd7#
        • 2.dxe5#
      • 1...Qxf7!
  • Keys
    • 1.Rexe5+!
      • 1...Kc4+
        • 2.d5#
      • 1...Kd6+
        • 2.Re4#
      • 1...Qxe5
        • 2.Qf7#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • K(e);N_SPINP(f),P_PINR(F),S_FLIGHT::S(B)
    • K(e);P-FLIGHT,P_PINR(F),P_SPINQ(h)::QAB1(G),XP(f)
    • Q(h);N_GUARD::QAB(G)
    • Q(h);N_GUARD::QAB(G),XQ(h)
  • Tries
    • Try
      • S(B);CHECK
      • Refutation
        • K(e);P_PINR(F),S_FLIGHT
    • Try
      • Q(G);CHECK,XP(f)
      • Refutation
        • Q(h);P_SPINQ(h),XQ(G)
    • Try
      • Q(G);
      • Threat
        • S(B)
      • Vars
        • K(e);N_SPINP(f),P_PINR(F),S_FLIGHT::S(B)
      • Refutation
        • P(d);XP(E)
    • Try
      • Q(G);CHECK
      • Refutation
        • Q(h);XQ(G)
  • Actual
    • R(F);CHECK,XP(f)
    • Vars
      • K(e);CHECK,OGATE,S_FLIGHT::QAR(G)+P(E)
      • K(e);CHECK,P-FLIGHT,P_SPINQ(h)::QAB(G)+R(F)
      • Q(h);P_SPINQ(h),XR(F)::QAB(G)
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