MESON Chess Problem Database

Problem Display
PID: 87776 (2n3q1/1Kp3p1/N1Np2R1/1p1k4/7r/3P4/1b6/4Q3 w - - 0 1)

Sedgwick, Stanley

American Chess Problemist, 1952

2n3q1/1Kp3p1/N1Np2R1/1p1k4/7r/3P4/1b6/4Q3

#2

6 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qe6
      • 2.Qxe6#
    • 1...Qh7
      • 2.Qe6#
    • 1...Qd8
      • 2.Qe6#
    • 1...Qf8
      • 2.Qe6#
    • 1...Qh8
      • 2.Qe6#
    • 1...Rh1
      • 2.Qxh1#
      • 2.Qe4#
    • 1...Rh2
      • 2.Qe4#
    • 1...Rh3
      • 2.Qe4#
    • 1...Rd4
      • 2.Rg5#
    • 1...Re4
      • 2.Qxe4#
    • 1...Rh5
      • 2.Qe4#
    • 1...Rh6
      • 2.Qe4#
    • 1...Rh7
      • 2.Qe4#
    • 1...Rh8
      • 2.Qe4#
    • 1...Ba3
      • 2.Rg5#
    • 1...Bd4
      • 2.Scb4#
  • Tries
    • 1.Qb4?
      • threat
        • 2.Sxc7#
        • 2.Qxb5#
      • 1...Bf6
        • 2.Sxc7#
      • 1...Qf7
        • 2.Qxb5#
      • 1...Qd8
        • 2.Qxb5#
      • 1...Rc4
        • 2.Sxc7#
      • 1...Ba3
        • 2.Sxc7#
      • 1...Bd4
        • 2.Sxc7#
        • 2.Qb3#
      • 1...Sa7
        • 2.Sxc7#
      • 1...Rxb4!
    • 1.Qh1+?
      • 1...Re4
        • 2.Qxe4#
      • 1...Rxh1!
    • 1.Qe3?
      • threat
        • 2.Sxc7#
      • 1...Qd8
        • 2.Qe6#
      • 1...Rd4
        • 2.Rg5#
        • 2.Qg5#
      • 1...Bd4
        • 2.Scb4#
      • 1...Qf7!
  • Keys
    • 1.Qf2!
      • threat
        • 2.Sxc7#
      • 1...Qf7
        • 2.Qxf7#
      • 1...Qd8
        • 2.Qf7#
      • 1...Rd4
        • 2.Qf5#
      • 1...Bd4
        • 2.Qa2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 1
    • REMOVED MATES = 12
  • Sets
    • Q(i);N_GUARD::QAB1(A),XQ(i)
    • Q(i);N_GUARD::QAB1(A)
    • R(b);N_GUARD::QAB1(A)
    • R(b);S_CUTB(a)::R(E)
    • R(b);N_GUARD::QAB1(A),XR(b)
    • B(a);N_GUARD::R(E)
    • B(a);SBLOCK,S_CUTR(b)::S(D)
  • Tries
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • B(a);::S(C),XP(f)
        • Q(i);::QAR2(A),XP(c)
        • R(b);::S(C),XP(f)
        • S(h);::S(C),XP(f)
      • Refutation
        • R(b);XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • R(b);N_GUARD,P_SPINR(b)::QAB1(A),XR(b)
      • Refutation
        • R(b);XQ(A)
    • Try
      • Q(A);
      • Threat
        • S(C),XP(f)
      • Vars
        • Q(i);N_GUARD::QAB1(A)
        • B(a);S_CUTR(b)::S(D)
      • Refutation
        • Q(i);
  • Actual
    • Q(A);
    • Threat
      • S(C),XP(f)
    • Vars
      • Q(i);N_GUARD::QAB(A),XQ(i)
      • Q(i);N_GUARD::QAB(A)
      • R(b);S_CUTB(a)::QAR2(A)
      • B(a);OGATE::QAB(A)
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