MESON Chess Problem Database

Problem Display
PID: 21846 (n2Q4/2p5/5N1q/1rR1B1k1/4B2b/6p1/b1p3K1/1n6 w - - 0 1)

Rothstein, Louis

HM., Haagsche Post, 1921

n2Q4/2p5/5N1q/1rR1B1k1/4B2b/6p1/b1p3K1/1n6

#2

6 + 10

3360 Simple Two-move Themes 1924

SOLUTION

  • SOUND
  • Sets
    • 1...Rb3
      • 2.Bxg3#
      • 2.Bd6#
      • 2.Bxc7#
    • 1...Sd2
      • 2.Qxd2#
    • 1...Sa3
      • 2.Qd2#
    • 1...Sc3
      • 2.Qd2#
  • Tries
    • 1.Bd4+?
      • 1...Rxc5
        • 2.Be3#
      • 1...Bd5
        • 2.Be3#
      • 1...Kf4!
    • 1.Qg8+?
      • 1...Qg7
        • 2.Qxg7#
      • 1...Qg6
        • 2.Qxg6#
      • 1...Bxg8!
  • Keys
    • 1.Kf3!
      • threat
        • 2.Bf4#
      • 1...Qh5+
        • 2.Sg4#
      • 1...Rb3+
        • 2.Bc3#
      • 1...Sd2+
        • 2.Qxd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • S(a);N_GUARD::QAB(F),XS(a)
    • S(a);N_GUARD::QAB(F)
  • Tries
    • Try
      • B(D);CHECK
      • Vars
        • R(f);XR(C)::B(D)
        • B(b);P_PINB(B),P_SPINB(b)::B(D)
      • Refutation
        • K(g);S_FLIGHT
    • Try
      • Q(F);CHECK
      • Vars
        • Q(h);N_GUARD,P_SPINQ(h)::QAR2(F),XQ(h)
        • Q(h);N_GUARD,P_SPINQ(h)::QAR1(F),XQ(h)
      • Refutation
        • B(b);XQ(F)
  • Actual
    • K(A);S_FLIGHT
    • Threat
      • R(C)+B(D),DCHECK
    • Vars
      • Q(h);CHECK,N_GUARD,SBLOCK::QAB(F)+S(E)
      • R(f);CHECK,N_GUARD,S_CUTB(b)::R(C)+B(D)
      • S(a);CHECK,N_GUARD::QAB(F),XS(a)
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