MESON Chess Problem Database

Problem Display
PID: 180743 (4r3/3pB1pr/p2p2B1/1pP5/N2kPQ1p/R2P2p1/8/2R3K1 w - - 0 1)

Sukhodolov, Nikolai

2nd Prize, Birnov MT, 2013

4r3/3pB1pr/p2p2B1/1pP5/N2kPQ1p/R2P2p1/8/2R3K1

#2

10 + 10

23 Die Schwalbe 2018
3713 Snap 2022

SOLUTION

  • SOUND
  • Sets
    • 1...bxa4
      • 2.Rc4#
    • 1...b4
      • 2.Rc4#
    • 1...dxc5
      • 2.Bxc5#
    • 1...d5
      • 2.e5#
  • Tries
    • 1.Bg5?
      • threat
        • 2.Qxd6#
      • 1...dxc5
        • 2.Qd6#
      • 1...Re5
        • 2.Qe3#
      • 1...d5
        • 2.e5#
      • 1...Re6!
    • 1.Re1?
      • threat
        • 2.Qxd6#
      • 1...dxc5
        • 2.Bxc5#
        • 2.Qd6#
      • 1...d5
        • 2.e5#
      • 1...Rh5!
  • Keys
    • 1.Sc3!
      • threat
        • 2.Se2#
      • 1...Kxd3
        • 2.e5#
      • 1...Kxc5
        • 2.Qxd6#

This anticipates 267522(2013)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • P(d);N_GUARD,XS(E)::R1(A)
    • P(d);N_GUARD::R1(A)
    • P(f);OGATE,XP(H)::B(J),XP(f)
    • P(f);SBLOCK::QAR(G)+P(F)
  • Tries
    • Try
      • B(J);
      • Threat
        • QAR2(G),XP(f)
      • Vars
        • P(f);XP(H)::QAR2(G)
        • R(j);SBLOCK::QAB1(G)
        • P(f);SBLOCK::QAR(G)+P(F)
      • Refutation
        • R(j);
    • Try
      • R(A);
      • Threat
        • QAR2(G),XP(f)
      • Vars
        • P(f);SBLOCK::QAR(G)+P(F)
      • Refutation
        • R(i);
  • Actual
    • S(E);
    • Threat
      • S(E)
    • Vars
      • K(b);P-FLIGHT,XP(D)::B(I)+P(F)
      • K(b);P_SPINP(f),S_FLIGHT,XP(H)::QAB1(G),XP(f)
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