MESON Chess Problem Database

Problem Display
PID: 103778 (2b3B1/4K3/4pp2/2pk2p1/1RpN2p1/3N4/n4Q2/3R4 w - - 0 1)

Shanshin, Valery Yurevich

2nd Prize, Valery Kirillov-50 JT, 2001

2b3B1/4K3/4pp2/2pk2p1/1RpN2p1/3N4/n4Q2/3R4

#2

7 + 9

56 The Problemist 2009
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...cxd3
      • 2.Qf5#
    • 1...c3
      • 2.Qg2#
      • 2.Qf5#
    • 1...cxd4
      • 2.Qg2#
  • Tries
    • 1.Sf4+?
      • 1...Ke4
        • 2.Re1#
      • 1...Ke5
        • 2.Re1#
        • 2.Qe3#
      • 1...gxf4!
    • 1.Sc6?
      • threat
        • 2.Qg2#
      • 1...Ke4
        • 2.Sxc5#
      • 1...Kxc6
        • 2.Qxc5#
      • 1...Sc3!
    • 1.Qxf6?
      • threat
        • 2.Qe5#
      • 1...Ke4
        • 2.Qe5#
      • 1...cxd3
        • 2.Qf5#
      • 1...cxd4!
  • Keys
    • 1.Sxc5!
      • threat
        • 2.Qf5#
      • 1...Kxc5
        • 2.Rb5#
      • 1...Ke5
        • 2.Sc6#
      • 1...f5
        • 2.Qxf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • P(b);XS(C)::QAR2(B)
    • P(d);SBLOCK,XS(E)::QAB(B)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(e);N_SPINP(g),S_FLIGHT::R(A)
      • Refutation
        • P(f);XS(C)
    • Try
      • S(E);
      • Threat
        • QAB(B)
      • Vars
        • K(e);N_SPINP(g),P_SPINP(b),S_FLIGHT::S(C),XP(d)
        • K(e);N_SPINP(g),S_FLIGHT,XS(E)::QAR1(B),XP(d)
      • Refutation
        • S(a);
    • Try
      • Q(B);XP(h)
      • Threat
        • QAR1(B)
      • Vars
        • K(e);N_SPINP(g),S_FLIGHT::QAR1(B)
        • P(b);XS(C)::QAR2(B)
      • Refutation
        • P(d);XS(E)
  • Actual
    • S(C);XP(d)
    • Threat
      • QAR2(B)
    • Vars
      • K(e);N_SPINP(g),OGATEB,P-FLIGHT,XS(C)::R1(D)
      • K(e);N_SPINP(g),P-FLIGHT::S(E)
      • P(h);::QAR2(B),XP(h)
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