MESON Chess Problem Database

Problem Display
PID: 274742 (bqB4N/2p3Pn/R3N3/2p4k/5R1p/5p2/3B3K/3Q4 w - - 0 1)

Gevers, Raymond

Die Schwalbe, 1933

bqB4N/2p3Pn/R3N3/2p4k/5R1p/5p2/3B3K/3Q4

#2

9 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Kh6
      • 2.Rxh4#
  • Tries
    • 1.Qxf3+?
      • 1...Kh6
        • 2.Rxh4#
        • 2.Rf6#
        • 2.g8S#
      • 1...Bxf3!
    • 1.Qe1?
      • threat
        • 2.Rxh4#
        • 2.Qxh4#
      • 1...Kh6
        • 2.Rxh4#
        • 2.Qxh4#
      • 1...Qb4
        • 2.Qxh4#
      • 1...h3
        • 2.Rh4#
        • 2.Qh4#
      • 1...c6
        • 2.Qxh4#
      • 1...f2!
  • Keys
    • 1.Rxf3!
      • threat
        • 2.Rf5#
      • 1...c6+
        • 2.Rg3#
      • 1...Kg4
        • 2.Rf4#
      • 1...Bxf3
        • 2.Qxf3#
      • 1...Sg5
        • 2.Sf4#
      • 1...h3
        • 2.Rxh3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • K(d);N_GUARD,N_SPINP(a),P-FLIGHT::B(B)+R(D),DCHECK,XP(b)
  • Tries
    • Try
      • Q(A);CHECK,XP(a)
      • Refutation
        • B(g);XQ(A)
    • Try
      • Q(A);N_PINP(a)
      • Threat
        • DUALS(2)
      • Vars
        • Q(h);::QAR1(A),XP(b)
        • P(e);P_PINR(D)::QAR1(A),XP(b)
      • Refutation
        • P(a);
  • Actual
    • R(D);XP(a)
    • Threat
      • QAB(A)+R(D),DCHECK
    • Vars
      • P(e);CHECK,S_CUTB(g)::QAB(A)+R(D)
      • K(d);N_GUARD,S_FLIGHT::QAB(A)+R(D),DCHECK
      • B(g);OGATE,P_SPINB(g),XR(D)::QAB(A),XB(g)
      • S(f);SBLOCK::S(F)
      • P(b);::QAB(A)+R(D),DCHECK,XP(b)
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