MESON Chess Problem Database

Problem Display
PID: 216263 (8/8/1K6/n2B3p/1pP3p1/b3knP1/1pRN1N2/2B3Q1 w - - 0 1)

Mosyah, George

Australasian (The), 1881

8/8/1K6/n2B3p/1pP3p1/b3knP1/1pRN1N2/2B3Q1

#2

9 + 8

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Ke2
      • 2.Sxf3#
    • 1...Sd4
      • 2.Sf1#
  • Tries
    • 1.Sd1+?
      • 1...Ke2
        • 2.Qf1#
      • 1...Kd3!
    • 1.Sxg4+?
      • 1...Ke2
        • 2.Qf1#
      • 1...Kd3!
    • 1.Qe1+?
      • 1...Kd4
        • 2.Qe4#
      • 1...Sxe1!
  • Keys
    • 1.Qd1!
      • threat
        • 2.Sf1#
      • 1...Sxc4+
        • 2.Sxc4#
      • 1...Kxf2
        • 2.Se4#
      • 1...Kd4
        • 2.Sxf3#
      • 1...Sxd2
        • 2.Qxd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • K(c);P-FLIGHT::R(C)+S(D),XS(d)
    • S(d);SBLOCK::B(A)+S(D),DCHECK
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • K(c);P-FLIGHT::QAB1(B)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • S(E);CHECK,XP(f)
      • Vars
        • K(c);P-FLIGHT::QAB1(B)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(c);OGATE,S_FLIGHT::QAR1(B)
      • Refutation
        • S(d);XQ(B)
  • Actual
    • Q(B);
    • Threat
      • B(A)+S(D),DCHECK
    • Vars
      • S(g);CHECK,XP(G)::B(A)+S(D),DCHECK,XS(g)
      • K(c);S_FLIGHT,XS(E)::R(C)+S(D),DCHECK
      • K(c);S_FLIGHT::QAR(B)+S(D),DCHECK,XS(d)
      • S(d);OGATE,P_SPINS(d),XS(D)::QAB1(B),XS(d)
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