MESON Chess Problem Database

Problem Display
PID: 45413 (4R1K1/q1p1BB1P/3p4/1P2R3/1r1k2P1/ppNp4/3Q3n/5b2 w - - 0 1)

Retter, Yosef

6th Place, 2. International Team (Friendship) Match, 1967-1970

4R1K1/q1p1BB1P/3p4/1P2R3/1r1k2P1/ppNp4/3Q3n/5b2

#2

10 + 10

3751 FIDE Album (1968-1970) 1977
3841 The Art of Israeli Chess Composition 1983

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe5
      • 2.h8Q#
      • 2.h8B#
    • 1...Qc5
      • 2.Re4#
    • 1...Rc4
      • 2.Rd5#
    • 1...dxe5
      • 2.Rd8#
    • 1...c5
      • 2.Re4#
  • Tries
    • 1.Sd1?
      • threat
        • 2.Qc3#
        • 2.Qe3#
        • 2.Qf4#
      • 1...Sxg4
        • 2.Qc3#
        • 2.Qf4#
      • 1...dxe5
        • 2.Qe3#
        • 2.Qxb4#
      • 1...d5
        • 2.Qc3#
        • 2.Qf4#
      • 1...Qc5
        • 2.Qe3#
        • 2.Qf4#
      • 1...Qb7
        • 2.Qc3#
        • 2.Qe3#
      • 1...Qa8
        • 2.Qc3#
        • 2.Qe3#
      • 1...Rc4
        • 2.Qe3#
        • 2.Qf4#
      • 1...Bg2
        • 2.Qc3#
        • 2.Qe3#
      • 1...Kxe5!
    • 1.Se2+?
      • 1...Kxe5
        • 2.Bh4#
        • 2.Bg5#
        • 2.Bd8#
      • 1...Bxe2!
    • 1.Bxd6?
      • threat
        • 2.Re4#
      • 1...Qb7
        • 2.Bc5#
      • 1...Qa8
        • 2.Bc5#
      • 1...Bg2
        • 2.Se2#
      • 1...cxd6!
    • 1.Qf2+?
      • 1...Kxe5
        • 2.Bh4#
        • 2.Bg5#
        • 2.Bf6#
        • 2.Bd8#
        • 2.Bf8#
        • 2.Qf6#
        • 2.h8Q#
        • 2.h8B#
      • 1...Kxc3!
  • Keys
    • 1.Sd5!
      • threat
        • 2.Qc3#
      • 1...Kc4
        • 2.Qxb4#
      • 1...Kc5
        • 2.Qxb4#
      • 1...Kxe5
        • 2.Bf6#
      • 1...dxe5
        • 2.Qxb4#
      • 1...Qc5
        • 2.Qf4#
      • 1...Rc4
        • 2.Qe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • K(g);N_SPINP(e),S_FLIGHT,XR(E)::P=Q
    • Q(i);SBLOCK::R1(E)
    • R(f);SBLOCK::R1(E)
    • P(h);OGATEB,SBLOCK,XR(E)::R(I)
    • P(j);SBLOCK::R1(E)
  • Tries
    • Try
      • S(B);
      • Threat
        • DUALS(3)
      • Refutation
        • K(g);N_SPINP(e),S_FLIGHT,XR(E)
    • Try
      • S(B);CHECK
      • Refutation
        • B(a);XS(B)
    • Try
      • B(F);XP(h)
      • Threat
        • R1(E)
      • Vars
        • Q(i);N_GUARD::B(F)
        • Q(i);N_GUARD,P_PINR(I)::B(F)
        • B(a);N_GUARD::S(B)
      • Refutation
        • P(j);XB(F)
    • Try
      • Q(A);CHECK,N_PINP(e)
      • Refutation
        • K(g);S_FLIGHT,XS(B)
  • Actual
    • S(B);
    • Threat
      • QAB1(A)
    • Vars
      • K(g);N_SPINP(e),P-FLIGHT::QAR1(A),XR(f)
      • K(g);N_SPINP(e),P_SPINP(h),S_FLIGHT::QAB1(A),XR(f)
      • K(g);N_SPINP(e),OGATEB,S_FLIGHT,XR(E)::R(I)+B(F),DCHECK
      • P(h);SBLOCK,XR(E)::QAR2(A),XR(f)
      • Q(i);SBLOCK::QAR2(A)
      • R(f);SBLOCK::QAB1(A)
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