MESON Chess Problem Database

Problem Display
PID: 101992 (3R1r1b/4QN2/2p5/2pr1P1K/3k2BR/2pqNP1P/2p5/6B1 w - - 0 1)

Buchwald, Julius

Comm., BCF 107. Ty., 1964-1965

3R1r1b/4QN2/2p5/2pr1P1K/3k2BR/2pqNP1P/2p5/6B1

#2

11 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qf1
      • 2.Qe4#
    • 1...Qe2
      • 2.Qe4#
    • 1...Qc4
      • 2.Qe4#
    • 1...Qe4
      • 2.Qxe4#
    • 1...Qb5
      • 2.Qe4#
    • 1...Qxf5+
      • 2.Bxf5#
    • 1...Qa6
      • 2.Qe4#
    • 1...Qd1
      • 2.Qe4#
    • 1...Qd2
      • 2.Qe4#
    • 1...Qxe3
      • 2.Qe4#
    • 1...Rd6
      • 2.Rxd6#
      • 2.Qxd6#
    • 1...Rd7
      • 2.Rxd7#
      • 2.Qxd7#
    • 1...Be5
      • 2.Qxe5#
    • 1...Bf6
      • 2.Qxf6#
    • 1...c4
      • 2.Sxc2#
  • Tries
    • 1.Sd1+?
      • 1...Qe3
        • 2.Qe4#
      • 1...Kc4!
    • 1.Sf1+?
      • 1...Qe3
        • 2.Qe4#
      • 1...Kc4!
    • 1.Sg2+?
      • 1...Qe3
        • 2.Qe4#
      • 1...Kc4!
    • 1.Sc4+?
      • 1...Qe3
        • 2.Qe4#
      • 1...Kxc4!
    • 1.Sxd5+?
      • 1...Qe3
        • 2.Qe4#
      • 1...Kc4!
  • Keys
    • 1.Sd6!
      • threat
        • 2.Sxc2#
      • 1...Qxf5+
        • 2.Bxf5#
      • 1...Rdxf5+
        • 2.Sdxf5#
      • 1...Rfxf5+
        • 2.Sexf5#
      • 1...Qxe3
        • 2.Qxe3#
        • 2.Qe4#
      • 1...Rxd6
        • 2.Rxd6#
        • 2.Qxd6#
      • 1...Qf1
        • 2.Qe4#
      • 1...Qe2
        • 2.Qe4#
      • 1...Qc4
        • 2.Qe4#
      • 1...Qe4
        • 2.Qxe4#
      • 1...Qb5
        • 2.Qe4#
      • 1...Qa6
        • 2.Qe4#
      • 1...Qd1
        • 2.Qe4#
      • 1...Qd2
        • 2.Qe4#
      • 1...c1Q
        • 2.Sc2#
      • 1...c1S
        • 2.Sc2#
      • 1...c1B
        • 2.Sc2#
      • 1...c1R
        • 2.Sc2#
      • 1...Re5
        • 2.Sb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 4
  • Sets
    • Q(c);N_GUARD::QAR1(I)
    • Q(c);N_GUARD::QAR1(I),XQ(c)
    • Q(c);CHECK,OGATE,XP(G)::R(F)+B(E),XQ(c)
    • Q(c);N_GUARD,P_SPINQ(c),XS(B)::QAR1(I)
    • B(i);N_GUARD,N_PINP(G)::QAB1(I),XB(i)
    • B(i);N_GUARD::QAB(I),XB(i)
    • P(e);SBLOCK::B(A)+S(B),DCHECK,XP(a)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • Q(c);P_SPINQ(c)::QAR1(I)
      • Refutation
        • K(d);N_SPINR(f),P-FLIGHT
    • Try
      • S(B);CHECK
      • Vars
        • Q(c);P_SPINQ(c)::QAR1(I)
      • Refutation
        • K(d);N_SPINR(f),P-FLIGHT
    • Try
      • S(B);CHECK
      • Vars
        • Q(c);P_SPINQ(c)::QAR1(I)
      • Refutation
        • K(d);N_SPINR(f),P-FLIGHT
    • Try
      • S(B);CHECK
      • Vars
        • Q(c);P_SPINQ(c)::QAR1(I)
      • Refutation
        • K(d);N_SPINR(f),P-FLIGHT,XS(B)
    • Try
      • S(B);CHECK,N_SPINP(G),XR(f)
      • Vars
        • Q(c);P_SPINQ(c)::QAR1(I)
      • Refutation
        • K(d);P-FLIGHT
  • Actual
    • S(J);N_PINR(f)
    • Threat
      • B(A)+S(B),DCHECK,XP(a)
    • Vars
      • Q(c);CHECK,OGATE,XP(G)::R(F)+B(E),XQ(c)
      • R(f);CHECK,XP(G)::R(K)+S(J),DCHECK,XR(f)
      • R(h);CHECK,XP(G)::B(A)+S(B),DCHECK,XR(h)
      • Q(c);N_GUARD::QAR1(I)
      • Q(c);N_GUARD::QAR1(I),XQ(c)
      • P(a);::B(A)+S(B),DCHECK
      • R(f);::R(K)+S(J),DCHECK
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