MESON Chess Problem Database

Problem Display
PID: 91971 (8/8/2p5/2k1pK2/3R4/1Q3N2/3b4/8 w - - 0 1)

Matthaus, Hans Georg

Deutsche Schachblatter, 1986

8/8/2p5/2k1pK2/3R4/1Q3N2/3b4/8

#2

4 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bc1
      • 2.Qb4#
    • 1...Be3
      • 2.Qb4#
    • 1...Bb4
      • 2.Qxb4#
    • 1...Bf4
      • 2.Qb4#
    • 1...Bg5
      • 2.Qb4#
    • 1...Bh6
      • 2.Qb4#
  • Tries
    • 1.Ke6?
      • threat
        • 2.Rc4#
      • 1...Bb4
        • 2.Qxb4#
      • 1...exd4!
    • 1.Sxd2?
      • threat
        • 2.Qb4#
      • 1...exd4
        • 2.Se4#
      • 1...Kxd4!
    • 1.Rc4+?
      • 1...Kd5
        • 2.Qd3#
      • 1...Kd6!
  • Keys
    • 1.Sg5!
      • threat
        • 2.Se6#
      • 1...Kxd4
        • 2.Se6#
      • 1...Bxg5
        • 2.Qb4#
      • 1...exd4
        • 2.Se4#
      • 1...Bb4
        • 2.Qxb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • B(a);N_GUARD::QAB1(A)
    • B(a);N_GUARD::QAB1(A),XB(a)
  • Tries
    • Try
      • K(D);S_FLIGHT
      • Threat
        • R1(C)
      • Vars
        • B(a);N_GUARD::QAB1(A),XB(a)
      • Refutation
        • P(c);XR(C)
    • Try
      • S(B);XB(a)
      • Threat
        • QAB1(A)
      • Vars
        • P(c);SBLOCK,XR(C)::S(B)
      • Refutation
        • K(b);S_FLIGHT,XR(C)
    • Try
      • R(C);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR2(A)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • S(B);
    • Threat
      • S(B)
    • Vars
      • K(b);S_FLIGHT,XR(C)::S(B)
      • B(a);N_GUARD,XS(B)::QAB1(A)
      • P(c);SBLOCK,XR(C)::S(B)
      • B(a);N_GUARD::QAB1(A),XB(a)
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