MESON Chess Problem Database

Problem Display
PID: 11720 (4r2k/QR2p1p1/6K1/8/8/8/8/8 w - - 0 1)

Hernitz, Zvonimir

2nd Prize, L'Italia Scacchistica, 1971

4r2k/QR2p1p1/6K1/8/8/8/8/8

#2

3 + 4

3753 FIDE Album (1971-1973) 1978
2838 Fun with Chess Miniatures 1996
145 StrateGems 2008

SOLUTION

  • SOUND
  • Sets
    • 1...Ra8
      • 2.Qxa8#
    • 1...Rb8
      • 2.Rxb8#
      • 2.Qxb8#
  • Tries
    • 1.Rb8?
      • threat
        • 2.Rxe8#
      • 1...Kg8
        • 2.Rxe8#
      • 1...Rxb8
        • 2.Qxb8#
      • 1...Rc8
        • 2.Rxc8#
      • 1...Rd8
        • 2.Rxd8#
      • 1...Rf8
        • 2.Rxf8#
      • 1...Rg8!
    • 1.Qd4?
      • threat
        • 2.Qxg7#
      • 1...Kg8
        • 2.Qxg7#
      • 1...Rg8
        • 2.Qh4#
      • 1...e5!
    • 1.Qa1?
      • threat
        • 2.Qxg7#
      • 1...Kg8
        • 2.Qxg7#
      • 1...Rg8
        • 2.Qh1#
      • 1...e5!
  • Keys
    • 1.Qb8!
      • threat
        • 2.Qxe8#
      • 1...Kg8
        • 2.Qxe8#
      • 1...Rxb8
        • 2.Rxb8#
      • 1...Rc8
        • 2.Qxc8#
      • 1...Rd8
        • 2.Qxd8#
      • 1...Rf8
        • 2.Qxf8#
      • 1...Rg8
        • 2.Qh2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 1
  • Sets
    • R(c);OGATEB::QAB1(B),XR(c)
  • Tries
    • Try
      • R(C);P_PINR(c)
      • Threat
        • R(C),XR(c)
      • Vars
        • K(d);P-FLIGHT::R(C),XR(c)
        • R(c);N_SPINR(c),OGATE,XR(C)::QAR(B),XR(c)
        • R(c);OGATEB::R(C),XR(c)
        • R(c);OGATE::R(C),XR(c)
      • Refutation
        • R(c);
    • Try
      • Q(B);P_PINP(b)
      • Threat
        • QAB1(B),XP(b)
      • Vars
        • K(d);N_SPINP(b),P-FLIGHT::QAR1(B),XP(b)
        • R(c);SBLOCK::QAR(B)
      • Refutation
        • P(a);N_SPINP(b)
    • Try
      • Q(B);P_PINP(b)
      • Threat
        • QAB1(B),XP(b)
      • Vars
        • K(d);N_SPINP(b),P-FLIGHT::QAR1(B),XP(b)
        • R(c);SBLOCK::QAB(B)
      • Refutation
        • P(a);N_SPINP(b)
  • Actual
    • Q(B);P_PINR(c)
    • Threat
      • QAR(B),XR(c)
    • Vars
      • K(d);P-FLIGHT::QAR2(B),XR(c)
      • R(c);N_SPINR(c),OGATE,XQ(B)::R(C),XR(c)
      • R(c);OGATEB::QAR(B),XR(c)
      • R(c);OGATE::QAR2(B),XR(c)
      • R(c);SBLOCK::QAR(B)
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