MESON Chess Problem Database

Problem Display
PID: 66619 (Qn6/6pK/2R1r1N1/n3p3/2q3p1/RBB2kN1/2pP1ppP/1b3r2 w - - 0 1)

Neumann, Itzhak

2nd Prize, Munkassakk, 1936

Qn6/6pK/2R1r1N1/n3p3/2q3p1/RBB2kN1/2pP1ppP/1b3r2

#2

10 + 13

5828 My Selected Chess Problems (Neumann) 1968

SOLUTION

  • SOUND
  • Sets
    • 1...Qxc3
      • 2.Rxc3#
    • 1...Qf4
      • 2.Sh4#
    • 1...Rf6
      • 2.Rxf6#
    • 1...Rxg6
      • 2.Rf6#
    • 1...Re7
      • 2.Rf6#
    • 1...Re8
      • 2.Rf6#
  • Tries
    • 1.Sxe5+?
      • 1...Rxe5
        • 2.Rf6#
      • 1...Kf4!
    • 1.Rxc4+?
      • 1...Rc6
        • 2.Sh4#
        • 2.Sxe5#
      • 1...Sac6
        • 2.Sh4#
      • 1...Sb7
        • 2.Sh4#
      • 1...Sbc6
        • 2.Sh4#
      • 1...e4!
  • Keys
    • 1.Bxe5!
      • threat
        • 2.Sh4#
      • 1...Rxe5
        • 2.Rf6#
      • 1...Rxg6
        • 2.Rf6#
      • 1...c1Q
        • 2.Bd1#
      • 1...c1S
        • 2.Bd1#
      • 1...c1B
        • 2.Bd1#
      • 1...c1R
        • 2.Bd1#
      • 1...Qd3
        • 2.Bd5#
      • 1...Qe4
        • 2.Rc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 5
  • Sets
    • Q(g);OGATE,XB(E)::QAB(J)+R(G),DCHECK,XQ(g)
    • Q(g);SBLOCK::S(H)
    • R(k);OGATE::QAB(J)+R(G),DCHECK,XR(k)
    • R(k);OGATE,XS(H)::QAB(J)+R(G),DCHECK
    • R(k);OGATE::QAB(J)+R(G),DCHECK
  • Tries
    • Try
      • S(H);CHECK,XP(j)
      • Vars
        • R(k);OGATE,XS(H)::QAB(J)+R(G),DCHECK
      • Refutation
        • K(f);P-FLIGHT
    • Try
      • R(G);CHECK,XQ(g)
      • Vars
        • S(i);P_SPINS(i)::S(H)
        • S(m);P_SPINS(m)::S(H)
      • Refutation
        • P(j);P_SPINP(j)
  • Actual
    • B(E);XP(j)
    • Threat
      • S(H)
    • Vars
      • R(k);OGATE,XB(E)::QAB(J)+R(G),DCHECK
      • R(k);OGATE,XS(H)::QAB(J)+R(G),DCHECK
      • P(c);OGATE,P_PINS(H)::R(C)+B(D),DCHECK
      • Q(g);OGATE,P_PINS(H)::B(D)
      • Q(g);OGATE,P_PINS(H)::R(G)
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