MESON Chess Problem Database

Problem Display
PID: 67382 (8/4NN1p/6pr/3R3p/4pk1p/2B2b1K/6n1/3B1R2 w - - 0 1)

Ivanov, Vadim Aleksandrovich

2nd Prize, Hoffmann (Fritz)-70 JT, 2005

8/4NN1p/6pr/3R3p/4pk1p/2B2b1K/6n1/3B1R2

#2

7 + 9

23 Die Schwalbe 2006

SOLUTION

  • SOUND
  • Sets
    • 1...Ke3
      • 2.Bd2#
    • 1...Se3
      • 2.Be5#
    • 1...e3
      • 2.Rd4#
  • Tries
    • 1.Sg5?
      • 1...Ke3
        • 2.Bd2#
      • 1...Se3
        • 2.Se6#
      • 1...e3
        • 2.Rxf3#
      • 1...Se1!
    • 1.Bd2+?
      • 1...e3
        • 2.Rd4#
      • 1...Se3!
    • 1.Bf6?
      • threat
        • 2.Bg5#
      • 1...e3
        • 2.Rd4#
      • 1...g5
        • 2.Bxg5#
      • 1...Ke3!
    • 1.Rd3?
      • threat
        • 2.Be5#
      • 1...e3
        • 2.Rd4#
      • 1...exd3!
    • 1.Re5?
      • threat
        • 2.Sd5#
      • 1...Ke3
        • 2.Rxf3#
      • 1...Se3!
    • 1.Rf5+?
      • 1...gxf5
        • 2.Sd5#
      • 1...Ke3!
  • Keys
    • 1.Rd4!
      • threat
        • 2.Rxf3#
      • 1...Ke3
        • 2.Sd5#
      • 1...Se1
        • 2.Bd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • K(d);N_SPINB(b),S_FLIGHT::B(C)
    • S(a);SBLOCK::B(C)
    • P(c);OGATEB,SBLOCK::R(E)
  • Tries
    • Try
      • S(G);
      • Vars
        • K(d);N_SPINB(b),S_FLIGHT::B(C)
        • S(a);SBLOCK::S(G)
        • P(c);N_GUARD::R1(B),XB(b)
      • Refutation
        • S(a);
    • Try
      • B(C);CHECK
      • Vars
        • P(c);P_SPINP(c),S_CUTS(a)::R(E)
      • Refutation
        • S(a);P_SPINS(a)
    • Try
      • B(C);
      • Threat
        • B(C)
      • Vars
        • P(c);OGATEB,SBLOCK::R(E)
        • P(g);::B(C),XP(g)
      • Refutation
        • K(d);N_SPINB(b),S_FLIGHT
    • Try
      • R(E);
      • Threat
        • B(C)
      • Vars
        • P(c);OGATEB,SBLOCK::R(E)
      • Refutation
        • P(c);XR(E)
    • Try
      • R(E);
      • Threat
        • S(F)
      • Vars
        • K(d);N_SPINB(b),P_SPINP(c),S_FLIGHT::R1(B),XB(b)
      • Refutation
        • S(a);
    • Try
      • R(E);CHECK
      • Vars
        • P(g);SBLOCK,XR(E)::S(F)
      • Refutation
        • K(d);N_SPINB(b),S_FLIGHT
  • Actual
    • R(E);P_PINP(c)
    • Threat
      • R1(B),XB(b)
    • Vars
      • K(d);N_SPINB(b),N_SPINP(c),S_FLIGHT::S(F)
      • S(a);N_GUARD::B(C)
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