MESON Chess Problem Database

Problem Display
PID: 164742 (K2b4/8/p1n2p2/8/8/1RQ5/qP1N4/k2r4 w - - 0 1)

Palkoska, Emil

Shakhmatnoe obozrenie, 1903

K2b4/8/p1n2p2/8/8/1RQ5/qP1N4/k2r4

#2

5 + 7

15148 Sadier Collection 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Qxb2
      • 2.Ra3#
      • 2.Qxb2#
    • 1...Qa3
      • 2.Rxa3#
  • Tries
    • 1.Qc1+?
      • 1...Qb1
        • 2.Ra3#
      • 1...Rxc1!
  • Keys
    • 1.Ra3!
      • threat
        • 2.b3#
        • 2.b4#
      • 1...Qxa3
        • 2.Qxa3#
      • 1...Rxd2
        • 2.Qc1#
      • 1...Rb1
        • 2.Sb3#
      • 1...Rc1
        • 2.Qxc1#
      • 1...Ba5
        • 2.b4#
      • 1...Sb4
        • 2.b3#

There are these versions: 184783

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • Q(c);OGATEB::R(C),XQ(c)
  • Tries
    • Try
      • Q(D);CHECK
      • Vars
        • Q(c);P_SPINQ(c),S_CUTR(b)::R(C)
      • Refutation
        • R(b);XQ(D)
  • Actual
    • R(C);P_PINQ(c)
    • Threat
      • DUALS(2)
    • Vars
      • Q(c);N_SPINQ(c),OGATE,XR(C)::QAR2(D),XQ(c)
      • R(b);N_GUARD,XS(B)::QAR2(D)
      • R(b);SBLOCK::S(B)
      • R(b);N_GUARD::QAR2(D),XR(b)
      • B(g);::QAB(D)+P(A)
      • S(e);::QAB(D)+P(A)
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