MESON Chess Problem Database

Problem Display
PID: 169053 (5q2/1Rp5/1r6/Rp6/1kPP3Q/1N1B1pp1/1NK5/6n1 w - - 0 1)

Kapustin, Fedor Mikhailovich

Permyakov, Evgeni Nikolaevich

1st Place, SuperProblem 029. TT, 2012

5q2/1Rp5/1r6/Rp6/1kPP3Q/1N1B1pp1/1NK5/6n1

#2

9 + 8

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Ra6
      • 2.Rbxb5#
    • 1...Rc6
      • 2.Ra4#
      • 2.Rbxb5#
    • 1...Rd6
      • 2.Ra4#
      • 2.Rbxb5#
    • 1...Re6
      • 2.Ra4#
      • 2.Rbxb5#
    • 1...Rf6
      • 2.Ra4#
      • 2.Rbxb5#
    • 1...Rg6
      • 2.Ra4#
      • 2.Rbxb5#
    • 1...Rh6
      • 2.Ra4#
      • 2.Rbxb5#
    • 1...g2
      • 2.Qe1#
  • Tries
    • 1.Rxb6?
      • threat
        • 2.Ra4#
        • 2.Rbxb5#
      • 1...Qc5
        • 2.Ra4#
      • 1...Qf5
        • 2.Ra4#
      • 1...Qa8
        • 2.Rbxb5#
      • 1...Qb8
        • 2.Ra4#
      • 1...Qe8
        • 2.Ra4#
      • 1...c6
        • 2.Ra4#
      • 1...cxb6!
    • 1.Qg5?
      • threat
        • 2.Qd2#
      • 1...bxc4
        • 2.Ra4#
      • 1...Qh6
        • 2.Qc5#
      • 1...Qf4
        • 2.Qc5#
      • 1...Se2!
    • 1.Qe7+?
      • 1...Rd6
        • 2.Ra4#
        • 2.Rbxb5#
        • 2.Qe1#
      • 1...c5
        • 2.Qe1#
      • 1...Qxe7!
  • Keys
    • 1.cxb5!
      • threat
        • 2.Ra4#
      • 1...Qc5+
        • 2.dxc5#
      • 1...Rc6+
        • 2.bxc6#
      • 1...Qa8
        • 2.d5#
      • 1...Ra6
        • 2.bxa6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • R(f);OGATE,P_SPINP(e)::R1(I),XP(e)
    • P(c);OGATE::QAB(G)
  • Tries
    • Try
      • R(I);P_PINP(e),XR(f)
      • Threat
        • DUALS(2)
      • Vars
        • Q(h);P_PINP(E)::R1(H)
        • Q(h);P_PINB(D)::R1(H)
        • Q(h);::R1(I),XP(e)
        • Q(h);::R1(H)
        • P(g);::R1(H)
      • Refutation
        • P(g);N_SPINP(e),XR(I)
    • Try
      • Q(G);
      • Threat
        • QAB(G)
      • Vars
        • P(e);N_GUARD,P_SPINR(f),XP(E)::R1(H)
        • Q(h);N_GUARD::QAB1(G)
      • Refutation
        • S(a);
    • Try
      • Q(G);CHECK
      • Vars
        • P(g);P_SPINP(g)::QAB(G)
      • Refutation
        • Q(h);XQ(G)
  • Actual
    • P(E);XP(e)
    • Threat
      • R1(H)
    • Vars
      • Q(h);CHECK,OGATE::QAR(G)+P(F),XQ(h)
      • R(f);CHECK,OGATE::R(I)+P(E),XR(f)
      • Q(h);N_GUARD::QAR(G)+P(F)
      • R(f);OGATE::R(I)+P(E),XR(f)
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