MESON Chess Problem Database

Problem Display
PID: 231339 (2BbN1nN/3R4/b3k2p/4p2p/3p4/Kp4pP/1Pr5/7Q w - - 0 1)

Kubbel, Arvid Ivanovich

Shakhmaty, 1927

2BbN1nN/3R4/b3k2p/4p2p/3p4/Kp4pP/1Pr5/7Q

#2

8 + 11

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rxb2
      • 2.Rb7#
    • 1...Rd2
      • 2.Rb7#
    • 1...Re2
      • 2.Rb7#
    • 1...Rf2
      • 2.Rb7#
    • 1...Rh2
      • 2.Rb7#
    • 1...Bf1
      • 2.Rc7#
    • 1...Be2
      • 2.Rc7#
    • 1...Bd3
      • 2.Rc7#
    • 1...Bc4
      • 2.Ra7#
      • 2.Rb7#
      • 2.Rc7#
      • 2.Rf7#
      • 2.Rg7#
      • 2.Rh7#
    • 1...Be7+
      • 2.Rd6#
    • 1...Sf6
      • 2.Sg7#
    • 1...Se7
      • 2.Rd6#
    • 1...e4
      • 2.Qxe4#
  • Tries
    • 1.Qf3?
      • threat
        • 2.Sg7#
        • 2.Qf7#
      • 1...Be7+
        • 2.Rd6#
      • 1...Rxc8
        • 2.Qf7#
      • 1...Bxc8
        • 2.Qf7#
      • 1...e4
        • 2.Qxe4#
      • 1...Rf2
        • 2.Sg7#
        • 2.Rb7#
      • 1...Sf6
        • 2.Sg7#
      • 1...Bf6!
  • Keys
    • 1.h4!
      • threat
        • 2.Qh3#
      • 1...Be7+
        • 2.Rd6#
      • 1...Kf5
        • 2.Rf7#
      • 1...e4
        • 2.Qxe4#
      • 1...Rf2
        • 2.Rb7#
      • 1...Rh2
        • 2.Rb7#
      • 1...Bf1
        • 2.Rc7#
      • 1...Be2
        • 2.Rc7#
      • 1...Bd3
        • 2.Rc7#
      • 1...Sf6
        • 2.Sg7#
      • 1...Se7
        • 2.Rd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • R(a);N_GUARD,XP(B)::B(F)+R(E)
    • R(a);N_GUARD::B(F)+R(E)
    • B(g);N_GUARD::B(F)+R(E)
    • B(j);CHECK,SBLOCK::B(F)+R(E),DCHECK
    • S(k);SBLOCK::S(G)
    • S(k);SBLOCK::B(F)+R(E),DCHECK
    • P(e);OGATEB::QAR2(A),XP(e)
  • Tries
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • B(j);CHECK,SBLOCK::B(F)+R(E),DCHECK
        • R(a);XB(F)::QAB1(A)
        • B(g);XB(F)::QAB1(A)
        • P(e);OGATEB::QAR2(A),XP(e)
        • S(k);::S(G)
      • Refutation
        • B(j);
  • Actual
    • P(D);
    • Threat
      • QAB(A)
    • Vars
      • B(j);CHECK,SBLOCK::B(F)+R(E),DCHECK
      • K(h);S_FLIGHT::B(F)+R(E),DCHECK
      • P(e);OGATEB::QAR2(A),XP(e)
      • R(a);N_GUARD::B(F)+R(E)
      • B(g);N_GUARD::B(F)+R(E)
      • S(k);SBLOCK::S(G)
      • S(k);SBLOCK::B(F)+R(E),DCHECK
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