MESON Chess Problem Database

Problem Display
PID: 249734 (6BK/7p/1Rb4N/1pP1k2r/6Rp/8/r2PpP1P/2B3Q1 w - - 0 1)

Overkamp, Petrus

Jerusalem Post, 1953

(First published on Fri Feb 13 1953)

6BK/7p/1Rb4N/1pP1k2r/6Rp/8/r2PpP1P/2B3Q1

#2

11 + 8

15601 Albrecht-Leiss-Degener Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Bb2#
    • 1...Rb2
      • 2.Bxb2#
    • 1...Ra5
      • 2.Bb2#
    • 1...Ra6
      • 2.Bb2#
    • 1...Ra7
      • 2.Bb2#
    • 1...Ra8
      • 2.Bb2#
    • 1...Bh1
      • 2.d4#
    • 1...Bg2
      • 2.d4#
    • 1...Bf3
      • 2.d4#
    • 1...Be4
      • 2.f4#
    • 1...Bd5
      • 2.d4#
    • 1...Bb7
      • 2.d4#
    • 1...Bd7
      • 2.d4#
    • 1...Ba8
      • 2.d4#
    • 1...Be8
      • 2.d4#
  • Tries
    • 1.Rc4?
      • threat
        • 2.Qg7#
      • 1...Kf6
        • 2.Qg7#
      • 1...Rxh6
        • 2.Qg5#
      • 1...Ra7
        • 2.Bb2#
      • 1...Rf5
        • 2.Sg4#
      • 1...Rg5
        • 2.Qxg5#
      • 1...Bg2
        • 2.f4#
      • 1...Be4
        • 2.d4#
      • 1...bxc4!
    • 1.Qg3+?
      • 1...Kf6
        • 2.Qd6#
      • 1...hxg3!
    • 1.f4+?
      • 1...Ke4
        • 2.Qe3#
      • 1...Kf6!
  • Keys
    • 1.Rb4!
      • threat
        • 2.Qg7#
      • 1...Kf6
        • 2.Qg7#
      • 1...Rxh6
        • 2.Qg5#
      • 1...Ra7
        • 2.Bb2#
      • 1...Rf5
        • 2.Sg4#
      • 1...Rg5
        • 2.Qxg5#
      • 1...Bg2
        • 2.f4#
      • 1...Be4
        • 2.d4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 4
    • REMOVED MATES = 12
  • Sets
    • R(a);N_GUARD::B(A)
    • R(a);N_GUARD::B(A),XR(a)
    • R(a);N_GUARD,P_PINB(J)::B(A)
    • B(g);::P(C)
    • B(g);SBLOCK::P(D)
  • Tries
    • Try
      • R(F);
      • Threat
        • QAB(B)
      • Vars
        • K(e);P_SPINB(g),S_FLIGHT::QAB1(B)
        • R(f);N_GUARD,XS(I)::QAR2(B)
        • R(a);N_GUARD::B(A)
        • R(f);SBLOCK::S(I)
        • R(f);N_GUARD::QAR2(B),XR(f)
        • B(g);::P(D)
        • B(g);SBLOCK::P(C)
      • Refutation
        • P(d);XR(F)
    • Try
      • Q(B);CHECK
      • Vars
        • K(e);OGATE,P_SPINB(g),S_FLIGHT::QAR2(B)
      • Refutation
        • P(c);XQ(B)
    • Try
      • P(D);CHECK
      • Vars
        • K(e);N_GUARD,P-FLIGHT::QAR1(B)
      • Refutation
        • K(e);P_SPINB(g),S_FLIGHT
  • Actual
    • R(F);
    • Threat
      • QAB(B)
    • Vars
      • K(e);P_SPINB(g),S_FLIGHT::QAB1(B)
      • R(f);N_GUARD,XS(I)::QAR2(B)
      • R(a);N_GUARD::B(A)
      • R(f);SBLOCK::S(I)
      • R(f);N_GUARD::QAR2(B),XR(f)
      • B(g);::P(D)
      • B(g);SBLOCK::P(C)
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