MESON Chess Problem Database

Problem Display
PID: 258015 (2K4b/2NQ1p2/n4p1R/2ppkP1p/6bR/1nPq2P1/5N1B/1B5r w - - 0 1)

Neumann, I?

British Chess Magazine, 1934

2K4b/2NQ1p2/n4p1R/2ppkP1p/6bR/1nPq2P1/5N1B/1B5r

#2

11 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Qxb1
      • 2.Qxd5#
    • 1...Qf1
      • 2.Qxd5#
      • 2.Qe7#
    • 1...Qc2
      • 2.Qxd5#
    • 1...Qe2
      • 2.Qxd5#
      • 2.Qe7#
    • 1...Qc4
      • 2.Qe7#
    • 1...Qb5
      • 2.Qxd5#
      • 2.Qe7#
    • 1...Qd1
      • 2.Qe7#
    • 1...Qd2
      • 2.Qe7#
    • 1...Qxc3
      • 2.Qxd5#
    • 1...Qe3
      • 2.Qxd5#
      • 2.Qe7#
    • 1...Qf3
      • 2.Qe7#
    • 1...Qxg3
      • 2.Bxg3#
    • 1...Qd4
      • 2.Qe7#
    • 1...Bd1
      • 2.Sxd3#
    • 1...Bf3
      • 2.Sxd3#
    • 1...Bh3
      • 2.Sxd3#
    • 1...Sd4
      • 2.Qxd5#
    • 1...d4
      • 2.Qd5#
  • Tries
    • 1.Sxg4+?
      • 1...Ke4
        • 2.Qxd5#
      • 1...hxg4!
    • 1.Bxd3?
      • threat
        • 2.Qxd5#
        • 2.Qe7#
      • 1...Sxc7
        • 2.Qxc7#
      • 1...Bf3
        • 2.Qe7#
      • 1...Sd4
        • 2.Qxd5#
      • 1...Sb4
        • 2.Qe7#
      • 1...d4
        • 2.Qd5#
        • 2.Qe7#
      • 1...Bxf5!
    • 1.Qd6+?
      • 1...Kxf5
        • 2.Qf4#
        • 2.Qxd5#
      • 1...Kxd6!
  • Keys
    • 1.R6xh5!
      • threat
        • 2.Qe7#
      • 1...Qxf5
        • 2.Sxg4#
      • 1...Qxc3
        • 2.Qxd5#
      • 1...Qxg3
        • 2.Bxg3#
      • 1...Bxf5
        • 2.Sxd3#
      • 1...Bxh5
        • 2.Sxd3#
      • 1...Sxc7
        • 2.Qxc7#
      • 1...Sd4
        • 2.Qxd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 11
  • Sets
    • Q(c);N_GUARD,XB(A)::QAR1(J),XP(f)
    • Q(c);N_GUARD::QAR1(J),XP(f)
    • Q(c);::QAR2(J)
    • Q(c);N_GUARD,XP(D)::QAR1(J),XP(f)
    • Q(c);OGATE,P_SPINQ(c),XP(E)::B(C),XQ(c)
    • B(d);::S(B),XQ(c)
    • S(b);S_CUTQ(c)::QAR1(J),XP(f)
    • P(f);S_CUTQ(c)::QAR1(J)
  • Tries
    • Try
      • S(B);CHECK,XB(d)
      • Vars
        • K(g);P-FLIGHT,P_SPINQ(c)::QAB1(J),XP(f)
      • Refutation
        • P(h);XS(B)
    • Try
      • B(A);XQ(c)
      • Threat
        • DUALS(2)
      • Vars
        • S(i);OGATE,XS(I)::QAB(J),XS(i)
        • B(d);::QAR2(J)
        • S(b);::QAR1(J),XP(f)
        • S(i);::QAR2(J)
      • Refutation
        • B(d);P_PINQ(J),XP(G)
    • Try
      • Q(J);CHECK,P_SPINP(G)
      • Refutation
        • K(g);P_SPINP(j),S_FLIGHT,XQ(J)
  • Actual
    • R(H);XP(h)
    • Threat
      • QAR2(J)
    • Vars
      • Q(c);P_PINQ(J),P_SPINQ(c),XP(G)::S(B),XB(d)
      • Q(c);N_GUARD,XP(D)::QAR1(J),XP(f)
      • Q(c);OGATE,P_SPINQ(c),XP(E)::B(C),XQ(c)
      • B(d);P_PINQ(J),P_SPINB(d),XP(G)::S(B),XQ(c)
      • B(d);XR(H)::S(B),XQ(c)
      • S(i);OGATE,XS(I)::QAB(J),XS(i)
      • S(b);S_CUTQ(c)::QAR1(J),XP(f)
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