MESON Chess Problem Database

Problem Display
PID: 108667 (1Qb2n2/2B5/r2P3K/2p3R1/5kNp/6p1/6B1/6b1 w - - 0 1)

Konikowski, Jerzy

Prawda Zaporoza, 1964

1Qb2n2/2B5/r2P3K/2p3R1/5kNp/6p1/6B1/6b1

#2

7 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.d7#
    • 1...Ra2
      • 2.d7#
    • 1...Ra3
      • 2.d7#
    • 1...Ra4
      • 2.d7#
    • 1...Ra5
      • 2.d7#
    • 1...Rxd6+
      • 2.Bxd6#
    • 1...Ra8
      • 2.d7#
    • 1...Bb7
      • 2.Qxf8#
  • Tries
    • 1.Qb3?
      • threat
        • 2.Qf3#
      • 1...Rxd6+
        • 2.Bxd6#
      • 1...Ra3
        • 2.d7#
      • 1...Be3
        • 2.Qxe3#
      • 1...Bb7
        • 2.Qf7#
      • 1...Bxg4!
    • 1.Qa8?
      • threat
        • 2.Qf3#
        • 2.Qe4#
      • 1...Rxd6+
        • 2.Bxd6#
      • 1...Rxa8
        • 2.d7#
      • 1...Bxg4
        • 2.Qe4#
      • 1...Ra3
        • 2.Qe4#
        • 2.d7#
      • 1...Ra4
        • 2.Qf3#
        • 2.d7#
      • 1...Bf5
        • 2.Qf3#
      • 1...Bb7
        • 2.Qxf8#
      • 1...Rc6!
  • Keys
    • 1.Qb1!
      • threat
        • 2.Qe4#
      • 1...Rxd6+
        • 2.Bxd6#
      • 1...Ra4
        • 2.d7#
      • 1...Bf5
        • 2.Qxf5#
      • 1...Bb7
        • 2.Qf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 5
  • Sets
    • R(f);N_PINP(D)::B(F)+P(D)
    • R(f);CHECK,OGATE,P_SPINR(f),XP(D)::B(F),XR(f)
    • B(g);OGATE::QAR(G),XS(h)
  • Tries
    • Try
      • Q(G);
      • Threat
        • QAR1(G)
      • Vars
        • R(f);CHECK,OGATE,P_SPINR(f),XP(D)::B(F),XR(f)
        • R(f);N_PINP(D)::B(F)+P(D)
        • B(a);N_GUARD::QAB1(G),XB(a)
        • B(g);N_GUARD::QAR(G)
      • Refutation
        • B(g);XS(B)
    • Try
      • Q(G);
      • Threat
        • DUALS(2)
      • Vars
        • R(f);CHECK,OGATE,P_SPINR(f),XP(D)::B(F),XR(f)
        • R(f);N_PINP(D),XQ(G)::B(F)+P(D)
        • B(g);XS(B)::QAR1(G)
        • B(g);::QAR1(G)
        • B(g);OGATE::QAR(G),XS(h)
      • Refutation
        • R(f);
  • Actual
    • Q(G);
    • Threat
      • QAR1(G)
    • Vars
      • R(f);CHECK,OGATE,P_SPINR(f),XP(D)::B(F),XR(f)
      • R(f);N_PINP(D)::B(F)+P(D)
      • B(g);N_GUARD::QAR1(G),XB(g)
      • B(g);N_GUARD::QAR1(G)
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