MESON Chess Problem Database

Problem Display
PID: 57630 (b2N4/1r1p1R1K/nP1k1p2/5Q1p/1P4p1/1N1q1r2/3R1n2/B6B w - - 0 1)

Mortriner, Lucius

The Chess Review, 1936

b2N4/1r1p1R1K/nP1k1p2/5Q1p/1P4p1/1N1q1r2/3R1n2/B6B

#2

10 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Qd4
      • 2.Rxd4#
    • 1...Qd5
      • 2.Rxd5#
      • 2.Qxd5#
    • 1...Rxb6
      • 2.Rxd7#
    • 1...Rb8
      • 2.Rxd7#
    • 1...Sc5
      • 2.bxc5#
    • 1...Sc7
      • 2.Rxd7#
  • Tries
    • 1.Rxd3+?
      • 1...Rxd3
        • 2.Qf4#
        • 2.Qxf6#
      • 1...Sxd3!
  • Keys
    • 1.Sd4!
      • threat
        • 2.Sb5#
      • 1...Qxf5+
        • 2.Sxf5#
      • 1...Qxd4
        • 2.Rxd4#
      • 1...Rxf5
        • 2.Sxf5#
      • 1...Rxb6
        • 2.Rxd7#
      • 1...Qb5
        • 2.Sxb5#
      • 1...Sc7
        • 2.Rxd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • Q(b);N_PINQ(F),OGATE::R(C),XQ(b)
    • R(i);N_GUARD,XP(G)::R1(H),XP(j)
    • R(i);N_GUARD::R1(H),XP(j)
    • S(f);OGATE::P(E),XS(f)
    • S(f);S_CUTR(i)::R1(H),XP(j)
  • Tries
    • Try
      • R(C);CHECK,N_SPINQ(F),XQ(b)
      • Refutation
        • S(a);XR(C)
  • Actual
    • S(D);N_PINQ(b)
    • Threat
      • S(D)
    • Vars
      • Q(b);CHECK,XQ(F)::R(C)+S(D),DCHECK,XQ(b)
      • Q(b);N_PINQ(F),OGATE,P_SPINQ(b),XS(D)::R(C),XQ(b)
      • R(c);XQ(F)::S(D),XR(c)
      • R(i);N_GUARD,XP(G)::R1(H),XP(j)
      • Q(b);N_PINQ(F)::R(C)+S(D),DCHECK,XQ(b)
      • S(f);S_CUTR(i)::R1(H),XP(j)
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