MESON Chess Problem Database

Problem Display
PID: 218804 (8/Qp1Rp3/8/6p1/8/4P3/2p3NK/Rb3kN1 w - - 0 1)

Sommer, Bruno Oswald

Deutsche Schachzeitung, 1943

8/Qp1Rp3/8/6p1/8/4P3/2p3NK/Rb3kN1

#2

7 + 6

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...e5
      • 2.Rf7#
    • 1...e6
      • 2.Rf7#
  • Tries
    • 1.Qxb7?
      • threat
        • 2.Qf3#
      • 1...Kf2
        • 2.Qf3#
      • 1...g4!
  • Keys
    • 1.Qa2!
      • threat
        • 2.Qf7#
      • 1...Kf2
        • 2.Qf7#
      • 1...c1Q
        • 2.Qe2#
      • 1...c1S
        • 2.Rd1#
      • 1...c1B
        • 2.Rd1#
        • 2.Qe2#
      • 1...c1R
        • 2.Qe2#
      • 1...e6
        • 2.Rf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • P(f);OGATE::R(G)
  • Tries
    • Try
      • Q(F);XP(e)
      • Threat
        • QAR2(F)
      • Vars
        • K(b);N_SPINB(a),P-FLIGHT::QAR1(F)
      • Refutation
        • P(d);
  • Actual
    • Q(F);
    • Threat
      • QAR(F)
    • Vars
      • K(b);N_SPINB(a),P-FLIGHT,P_SPINP(c)::QAR(F)
      • P(c);N_SPINB(a),OGATE::QAB1(F)
      • P(c);N_GUARD,N_SPINB(a)::R(G)
      • P(f);OGATE::R(G)
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