MESON Chess Problem Database

Problem Display
PID: 240248 (B5bB/2p5/8/2RrN3/1p2P2R/1r2k1P1/4p2N/Qn1nK3 w - - 0 1)

Ellerman, Arnoldo

Tijdschrift vd KNSB, 1935

B5bB/2p5/8/2RrN3/1p2P2R/1r2k1P1/4p2N/Qn1nK3

#2

10 + 9

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rbd3
      • 2.Sc4#
    • 1...Rd2
      • 2.Shg4#
    • 1...Rdd3
      • 2.Shg4#
      • 2.Seg4#
    • 1...Rd4
      • 2.Shg4#
    • 1...Rxc5
      • 2.Shg4#
    • 1...Rd6
      • 2.Shg4#
    • 1...Rd7
      • 2.Shg4#
    • 1...Rd8
      • 2.Shg4#
  • Tries
    • 1.Qd4+?
      • 1...Rxd4
        • 2.Shg4#
      • 1...Kxd4!
  • Keys
    • 1.Qa7!
      • threat
        • 2.Rc3#
      • 1...Kd4
        • 2.Rc4#
      • 1...Rxc5
        • 2.Qxc5#
      • 1...Rc3
        • 2.Rxc3#
      • 1...Rbd3
        • 2.Sc4#
      • 1...Rdd3
        • 2.Seg4#
      • 1...Rd4
        • 2.Shg4#
      • 1...Sbc3
        • 2.Rxc3#
      • 1...Sdc3
        • 2.Rxc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 4
  • Sets
    • R(d);SBLOCK::S(H)
    • R(g);::S(C)
    • R(g);XR(G)::S(C)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • R(g);SBLOCK,XQ(A)::S(C)
      • Refutation
        • K(e);S_FLIGHT,XQ(A)
  • Actual
    • Q(A);
    • Threat
      • QAB(A)+R(G),DCHECK
    • Vars
      • K(e);S_FLIGHT::QAB(A)+R(G),DCHECK
      • R(g);OGATE,P_SPINR(g),XR(G)::QAB(A),XR(g)
      • R(d);::QAB(A)+R(G),DCHECK,XR(d)
      • R(d);SBLOCK::S(H)
      • R(g);SBLOCK::S(H)
      • R(g);SBLOCK::S(C)
      • S(a);::QAB(A)+R(G),DCHECK,XS(a)
      • S(b);::QAB(A)+R(G),DCHECK,XS(b)
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