MESON Chess Problem Database

Problem Display
PID: 10882 (2RBR3/r3pkN1/3p3K/3r1qP1/8/8/5Q2/8 w - - 0 1)

Sandin, Svante

Problem (Zagreb), 1969

2RBR3/r3pkN1/3p3K/3r1qP1/8/8/5Q2/8

#2

7 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Qf6+
      • 2.g6#
    • 1...Rd1
      • 2.Qxf5#
    • 1...Rd2
      • 2.Qxf5#
    • 1...Rd3
      • 2.Qxf5#
    • 1...Rd4
      • 2.Qxf5#
    • 1...e5
      • 2.Qxf5#
      • 2.g6#
    • 1...e6
      • 2.Qxa7#
      • 2.g6#
  • Tries
    • 1.Bb6?
      • threat
        • 2.Rf8#
      • 1...Qf6+
        • 2.g6#
      • 1...e5
        • 2.Qxf5#
      • 1...e6!
    • 1.Bc7?
      • threat
        • 2.Rf8#
      • 1...Qf6+
        • 2.g6#
      • 1...e5
        • 2.Qxf5#
      • 1...e6!
    • 1.Bxe7?
      • threat
        • 2.g6#
      • 1...Rxe7
        • 2.Rf8#
      • 1...Qf4!
  • Keys
    • 1.Ba5!
      • threat
        • 2.Rf8#
      • 1...Qf6+
        • 2.g6#
      • 1...e5
        • 2.Qxf5#
      • 1...e6
        • 2.Qxa7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • Q(b);CHECK::P(B)
    • R(a);N_GUARD::QAR2(A),XQ(b)
  • Tries
    • Try
      • B(F);
      • Threat
        • R1(G)
      • Vars
        • Q(b);CHECK::P(B)
        • P(e);S_CUTR(a)::QAR2(A),XQ(b)
      • Refutation
        • P(e);
    • Try
      • B(F);
      • Threat
        • R1(G)
      • Vars
        • Q(b);CHECK::P(B)
        • P(e);S_CUTR(a)::QAR2(A),XQ(b)
      • Refutation
        • P(e);
    • Try
      • B(F);XP(e)
      • Threat
        • P(B)
      • Vars
        • R(d);SBLOCK,XB(F)::R1(G)
      • Refutation
        • Q(b);P_PINP(B)
  • Actual
    • B(F);
    • Threat
      • R1(G)
    • Vars
      • Q(b);CHECK::P(B)
      • P(e);S_CUTR(a)::QAR2(A),XQ(b)
      • P(e);OGATEB::QAR(A),XR(d)
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