MESON Chess Problem Database

Problem Display
PID: 124457 (6n1/8/1r1p4/1rPR4/2N1kp2/1nKR1p2/3PP1b1/Q7 w - - 0 1)

Coutinho, Jose Ernesto

Match: Brazil - Israel, 1969-1971

6n1/8/1r1p4/1rPR4/2N1kp2/1nKR1p2/3PP1b1/Q7

#2

8 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rb7
      • 2.Sxd6#
    • 1...Rb8
      • 2.Sxd6#
    • 1...Bf1
      • 2.exf3#
    • 1...Bh3
      • 2.exf3#
    • 1...Sxa1
      • 2.R3d4#
    • 1...Sc1
      • 2.R3d4#
    • 1...Sxd2
      • 2.Sxd2#
      • 2.R3d4#
    • 1...Sd4
      • 2.R3xd4#
    • 1...Sa5
      • 2.R3d4#
    • 1...Sxc5
      • 2.R3d4#
    • 1...dxc5
      • 2.Re5#
  • Tries
    • 1.Qb1?
      • threat
        • 2.R3d4#
      • 1...Sd4
        • 2.R3xd4#
      • 1...fxe2!
    • 1.Qe1?
      • threat
        • 2.exf3#
      • 1...fxe2
        • 2.Qxe2#
      • 1...Sd4
        • 2.R3xd4#
      • 1...f2!
    • 1.Qa8?
      • threat
        • 2.Re5#
      • 1...Rb7
        • 2.Sxd6#
      • 1...Rc6!
  • Keys
    • 1.Qa7!
      • threat
        • 2.Qh7#
      • 1...dxc5
        • 2.Re5#
      • 1...Sd4
        • 2.R3xd4#
      • 1...Rb7
        • 2.Sxd6#
      • 1...Bh3
        • 2.exf3#
      • 1...Sf6
        • 2.Qe7#
      • 1...Sh6
        • 2.Qe7#
      • 1...Se7
        • 2.Qxe7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 6
  • Sets
    • R(g);N_GUARD::S(F),XP(h)
    • B(a);N_GUARD::P(C),XP(c)
    • S(b);N_GUARD,XQ(A)::R1(E)
    • S(b);N_GUARD::R1(E)
    • S(b);N_GUARD::R1(E),XS(b)
    • S(b);N_GUARD,XP(G)::R1(E)
    • P(h);N_GUARD,XP(G)::R1(H)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAB(A)+R(E),DCHECK
      • Vars
        • S(b);::QAB(A)+R(E),DCHECK,XS(b)
      • Refutation
        • P(c);XP(C)
    • Try
      • Q(A);
      • Threat
        • QAR(A)+P(C)DCHECK,XP(c)
      • Vars
        • P(c);OGATE,P_SPINP(c),XP(C)::QAR2(A),XP(c)
        • S(b);N_GUARD::R1(E),XS(b)
      • Refutation
        • P(c);
    • Try
      • Q(A);
      • Threat
        • QAB(A)+R(H),DCHECK
      • Vars
        • R(g);N_GUARD::S(F),XP(h)
      • Refutation
        • R(g);
  • Actual
    • Q(A);
    • Threat
      • QAB(A)
    • Vars
      • P(h);N_GUARD,XP(G)::R1(H)
      • S(b);N_GUARD::R1(E),XS(b)
      • R(g);N_GUARD::S(F),XP(h)
      • B(a);N_GUARD::P(C),XP(c)
      • S(i);N_GUARD::QAR(A)
      • S(i);N_GUARD::QAR(A),XS(i)
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