MESON Chess Problem Database

Problem Display
PID: 48453 (8/1p6/1B3NKp/1R3P1P/rp3k2/3P4/4B2n/4NnR1 w - - 0 1)

Zappas, Byron

3rd Prize, The Problemist, 1982/I

8/1p6/1B3NKp/1R3P1P/rp3k2/3P4/4B2n/4NnR1

#2

10 + 7

3752 FIDE Album (1980-1982) 1988
3389 Belgian Solving Championship 2003
5405 Chess Solving Yearbook 2003 2004

SOLUTION

  • SOUND
  • Sets
    • 1...Se3
      • 2.Bc7#
    • 1...Sg3
      • 2.Sg2#
    • 1...Sf3
      • 2.Rg4#
    • 1...Sg4
      • 2.Rxg4#
  • Tries
    • 1.Sc2?
      • threat
        • 2.Bc7#
      • 1...Sf3
        • 2.Rg4#
      • 1...Sg4
        • 2.Rxg4#
      • 1...Ra6!
    • 1.Sf3?
      • threat
        • 2.Sd5#
      • 1...Sxf3
        • 2.Rg4#
      • 1...Se3
        • 2.Bc7#
      • 1...Sg3!
    • 1.Se4?
      • threat
        • 2.Sg2#
      • 1...Se3
        • 2.Bc7#
      • 1...Sf3!
    • 1.Sg4?
      • threat
        • 2.Bc7#
      • 1...Sxg4
        • 2.Rxg4#
      • 1...Ra6
        • 2.Rxb4#
      • 1...Sf3!
    • 1.Bd4?
      • threat
        • 2.Sd5#
      • 1...Se3
        • 2.Be5#
      • 1...Ra6!
    • 1.Rg5?
      • threat
        • 2.Sg2#
      • 1...Sg4
        • 2.Rxg4#
      • 1...Se3
        • 2.Bc7#
      • 1...hxg5!
    • 1.Rxb4+?
      • 1...Ke5
        • 2.Bc7#
      • 1...Rxb4!
  • Keys
    • 1.Bf2!
      • threat
        • 2.Sg2#
      • 1...Se3
        • 2.Bg3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 3
  • Sets
    • S(a);SBLOCK::B(H)
    • S(a);SBLOCK::S(A)
    • S(b);N_GUARD::R1(B)
    • S(b);N_GUARD::R1(B),XS(b)
  • Tries
    • Try
      • S(A);
      • Threat
        • B(H)
      • Vars
        • S(b);N_GUARD::R1(B)
        • S(b);N_GUARD::R1(B),XS(b)
      • Refutation
        • R(c);
    • Try
      • S(A);
      • Threat
        • S(I)
      • Vars
        • S(b);N_GUARD,XS(A)::R1(B)
        • S(a);SBLOCK::B(H)
      • Refutation
        • S(a);
    • Try
      • S(I);
      • Threat
        • S(A)
      • Vars
        • S(a);SBLOCK::B(H)
      • Refutation
        • S(b);
    • Try
      • S(I);
      • Threat
        • B(H)
      • Vars
        • S(b);OGATE,XS(I)::R1(B),XS(b)
        • R(c);N_GUARD,P_PINB(H)::R(E),XP(d)
      • Refutation
        • S(b);
    • Try
      • B(H);
      • Threat
        • S(I)
      • Vars
        • S(a);SBLOCK::B(H)
      • Refutation
        • R(c);P_PINS(I)
    • Try
      • R(B);
      • Threat
        • S(A)
      • Vars
        • S(b);N_GUARD::R1(B),XS(b)
        • S(a);SBLOCK::B(H)
      • Refutation
        • P(f);XR(B)
    • Try
      • R(E);CHECK,XP(d)
      • Vars
        • K(e);S_FLIGHT::B(H)
      • Refutation
        • R(c);XR(E)
  • Actual
    • B(H);
    • Threat
      • S(A)
    • Vars
      • S(a);N_GUARD,SBLOCK::B(H)
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