MESON Chess Problem Database

Problem Display
PID: 89976 (8/8/8/5p2/N1Kp1p2/5Pp1/3pk1P1/R3BbQN w - - 0 1)

Myllyniemi, Matti Arvo

3rd HM., Die Schwalbe, 1962

8/8/8/5p2/N1Kp1p2/5Pp1/3pk1P1/R3BbQN

#2

8 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...d3
      • 2.Sc3#
  • Tries
    • 1.Bxg3?
      • threat
        • 2.Qf2#
      • 1...fxg3
        • 2.Sxg3#
      • 1...d1S!
    • 1.Qe3+?
      • 1...dxe3
        • 2.Sc3#
      • 1...fxe3
        • 2.Sxg3#
      • 1...Kxe3+!
    • 1.Qxf1+?
      • 1...Ke3
        • 2.Qd3#
      • 1...Kxf1!
  • Keys
    • 1.Qxd4!
      • threat
        • 2.Sc3#
        • 2.Qe5#
        • 2.Qxd2#
        • 2.Qd3#
      • 1...Bxg2
        • 2.Qd3#
      • 1...dxe1Q
        • 2.Qd3#
      • 1...dxe1S
        • 2.Sc3#
      • 1...dxe1B
        • 2.Qd3#
      • 1...dxe1R
        • 2.Sc3#
        • 2.Ra2#
        • 2.Qd3#
      • 1...d1Q
        • 2.Qe5#
      • 1...d1S
        • 2.Qd2#
      • 1...d1B
        • 2.Qe5#
        • 2.Qd2#
      • 1...d1R
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 1
  • Sets
    • P(e);N_GUARD::S(G)
  • Tries
    • Try
      • B(B);XP(d)
      • Threat
        • QAR1(C)
      • Vars
        • P(f);XB(B)::S(D),XP(f)
      • Refutation
        • P(b);
    • Try
      • Q(C);CHECK
      • Vars
        • P(e);SBLOCK,XQ(C)::S(G)
        • P(f);SBLOCK,XQ(C)::S(D),XP(d)
      • Refutation
        • K(c);CHECK,P-FLIGHT,XQ(C)
    • Try
      • Q(C);CHECK,XB(a)
      • Vars
        • K(c);OGATE,P-FLIGHT::QAR1(C)
      • Refutation
        • K(c);S_FLIGHT,XQ(C)
  • Actual
    • Q(C);XP(e)
    • Threat
      • DUALS(4)
    • Vars
      • B(a);XP(E)::QAB1(C)
      • P(b);XB(B)::QAB1(C)
      • P(b);XB(B)::S(G)
      • P(b);::QAR(C)
      • P(b);::QAR1(C)
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