MESON Chess Problem Database

Problem Display
PID: 180851 (4R3/3p1n2/1B1k1bRr/1pp2pq1/bN2p3/2Q4p/1KPN2P1/8 w - - 0 1)

Preiswerk, Walther Edouard

Schweizerische Schachzeitung, 1944

4R3/3p1n2/1B1k1bRr/1pp2pq1/bN2p3/2Q4p/1KPN2P1/8

#2

9 + 12

16108 Walther Preiswerks Shachprobleme (M. Henneberger) 1949

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd2
      • 2.Qxf6#
    • 1...Qe3
      • 2.Qxf6#
    • 1...Qf4
      • 2.Qxf6#
    • 1...Qxg2
      • 2.Qxf6#
    • 1...Qg3
      • 2.Qxf6#
    • 1...Qg4
      • 2.Qxf6#
    • 1...Qh5
      • 2.Qxf6#
    • 1...Se5
      • 2.Qxe5#
      • 2.Qxc5#
    • 1...Sd8
      • 2.Qe5#
    • 1...Sh8
      • 2.Qe5#
    • 1...c4
      • 2.Qd4#
    • 1...f4
      • 2.Sxe4#
  • Tries
    • 1.Kb1?
      • threat
        • 2.Qxc5#
      • 1...cxb4
        • 2.Qc5#
      • 1...Qe3
        • 2.Qxf6#
      • 1...c4
        • 2.Qd4#
      • 1...f4
        • 2.Sxe4#
      • 1...Bxc2+!
    • 1.Ka2?
      • threat
        • 2.Qxc5#
      • 1...cxb4
        • 2.Qc5#
      • 1...Qe3
        • 2.Qxf6#
      • 1...c4
        • 2.Qd4#
      • 1...f4
        • 2.Sxe4#
      • 1...Bb3+!
    • 1.Rxf6+?
      • 1...Rxf6
        • 2.Qxc5#
      • 1...Qxf6!
  • Keys
    • 1.Kc1!
      • threat
        • 2.Qxc5#
      • 1...Qxd2+
        • 2.Qxd2#
      • 1...cxb4
        • 2.Qc5#
      • 1...Qe3
        • 2.Qxf6#
      • 1...c4
        • 2.Qd4#
      • 1...f4
        • 2.Sxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 7
  • Sets
    • Q(g);N_GUARD,P_PINP(B),XS(C)::QAR2(E),XB(i)
    • Q(g);N_GUARD::QAR2(E),XB(i)
    • Q(g);N_GUARD,XP(D)::QAR2(E),XB(i)
    • S(l);N_GUARD::QAB1(E)
    • P(e);N_GUARD::QAR2(E)
    • P(f);N_GUARD::S(C),XP(c)
  • Tries
    • Try
      • K(A);N_SPINQ(E),P-FLIGHT
      • Threat
        • QAB1(E),XP(e)
      • Vars
        • P(e);XS(F)::QAB1(E)
        • Q(g);N_GUARD::QAR2(E),XB(i)
        • P(e);N_GUARD::QAR2(E)
        • P(f);N_GUARD::S(C),XP(c)
      • Refutation
        • B(b);CHECK,XP(B)
    • Try
      • K(A);N_SPINQ(E),P-FLIGHT
      • Threat
        • QAB1(E),XP(e)
      • Vars
        • P(e);XS(F)::QAB1(E)
        • Q(g);N_GUARD::QAR2(E),XB(i)
        • P(e);N_GUARD::QAR2(E)
        • P(f);N_GUARD::S(C),XP(c)
      • Refutation
        • B(b);CHECK
    • Try
      • R(H);CHECK,N_SPINQ(E),XB(i)
      • Vars
        • R(j);XR(H)::QAB1(E),XP(e)
      • Refutation
        • Q(g);P_PINQ(E),XR(H)
  • Actual
    • K(A);N_SPINQ(E),P_SPINS(C),S_FLIGHT
    • Threat
      • QAB1(E),XP(e)
    • Vars
      • Q(g);CHECK,OGATE,XS(C)::QAR(E),XQ(g)
      • P(e);XS(F)::QAB1(E)
      • Q(g);N_GUARD::QAR2(E),XB(i)
      • P(e);N_GUARD::QAR2(E)
      • P(f);N_PINS(C)::S(C),XP(c)
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