Meson Chess Problem Database

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Problem Display

PID: 109096 (3B4/7B/Kp3pr1/1RPPp3/2p1Q1P1/2k1P3/8/5N2 w - - 0 1)

Onkoud, Abdelaziz

Telescacco 92, 1999

3B4/7B/Kp3pr1/1RPPp3/2p1Q1P1/2k1P3/8/5N2

#2

10 + 6

6490	yacpdb	2009

SOLUTION

SOUND
Sets
- 1...Rxg4
  - 2.Qc2#
- 1...Rg5
  - 2.Qc2#
- 1...Rh6
  - 2.Qc2#
- 1...Rg7
  - 2.Qc2#
- 1...Rg8
  - 2.Qc2#
- 1...bxc5
  - 2.Ba5#
Tries
- 1.Kxb6?
  - 1...Rxg4
    - 2.Qc2#
  - 1...Rg5
    - 2.Qc2#
  - 1...Rh6
    - 2.Qc2#
  - 1...Rg7
    - 2.Qc2#
  - 1...Rg8
    - 2.Qc2#
  - 1...f5+!
- 1.Bxf6?
  - threat
    - 2.Bxe5#
  - 1...Rxf6
    - 2.Qc2#
    - 2.Qxe5#
  - 1...Rg5
    - 2.Qc2#
  - 1...bxc5!
- 1.Rxb6?
  - 1...Rxg4
    - 2.Qc2#
  - 1...Rg5
    - 2.Qc2#
  - 1...Rh6
    - 2.Qc2#
  - 1...Rg7
    - 2.Qc2#
  - 1...Rg8
    - 2.Qc2#
  - 1...f5!
- 1.Qf5?
  - 1...Rxg4
    - 2.Qc2#
  - 1...bxc5
    - 2.Ba5#
  - 1...Rg5
    - 2.Qc2#
  - 1...Rh6
    - 2.Qc2#
  - 1...Rg7
    - 2.Qc2#
  - 1...Rg8
    - 2.Qc2#
  - 1...e4!
- 1.Qd4+?
  - 1...Kc2
    - 2.Qd2#
  - 1...exd4!
- 1.cxb6?
  - 1...Rxg4
    - 2.Qc2#
  - 1...Rg5
    - 2.Qc2#
  - 1...Rh6
    - 2.Qc2#
  - 1...Rg7
    - 2.Qc2#
  - 1...Rg8
    - 2.Qc2#
  - 1...f5!
- 1.c6?
  - 1...Rxg4
    - 2.Qc2#
  - 1...Rg5
    - 2.Qc2#
  - 1...Rh6
    - 2.Qc2#
  - 1...Rg7
    - 2.Qc2#
  - 1...Rg8
    - 2.Qc2#
  - 1...f5!
- 1.d6?
  - 1...Rxg4
    - 2.Qc2#
  - 1...bxc5
    - 2.Ba5#
  - 1...Rg5
    - 2.Qc2#
  - 1...Rh6
    - 2.Qc2#
  - 1...Rg7
    - 2.Qc2#
  - 1...Rg8
    - 2.Qc2#
  - 1...f5!
Keys
- 1.Bc7!
  - 1...Rxg4
    - 2.Qc2#
  - 1...bxc5
    - 2.Ba5#
  - 1...f5
    - 2.Bxe5#
  - 1...Rg5
    - 2.Qc2#
  - 1...Rh6
    - 2.Qc2#
  - 1...Rg7
    - 2.Qc2#
  - 1...Rg8
    - 2.Qc2#

FEATURES

Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 0
Sets
- R(f);XP(D)::QAR1(C)
- R(f);::QAR1(C)
- P(d);OGATE,XP(F)::B(J)
Tries
- Try
  - K(H);P-FLIGHT,XP(d)
  - Vars
    - R(f);XP(D)::QAR1(C)
    - R(f);::QAR1(C)
  - Refutation
    - P(e);CHECK
- Try
  - B(J);P_PINP(c),XP(e)
  - Threat
    - B(J),XP(c)
  - Vars
    - R(f);::QAR1(C)
  - Refutation
    - P(d);P_PINB(J),XP(F)
- Try
  - R(E);XP(d)
  - Vars
    - R(f);XP(D)::QAR1(C)
    - R(f);::QAR1(C)
  - Refutation
    - P(e);P_PINR(E)
- Try
  - Q(C);
  - Vars
    - R(f);XP(D)::QAR1(C)
    - P(d);OGATE,XP(F)::B(J)
    - R(f);::QAR1(C)
  - Refutation
    - P(c);
- Try
  - Q(C);CHECK
  - Vars
    - K(a);P-FLIGHT,P_SPINR(f)::QAR1(C)
  - Refutation
    - P(c);XQ(C)
- Try
  - P(F);XP(d)
  - Vars
    - R(f);XP(D)::QAR1(C)
    - R(f);::QAR1(C)
  - Refutation
    - P(e);P_PINP(F)
- Try
  - P(F);
  - Vars
    - R(f);XP(D)::QAR1(C)
    - R(f);::QAR1(C)
  - Refutation
    - P(e);
- Try
  - P(G);
  - Vars
    - R(f);XP(D)::QAR1(C)
    - P(d);OGATE,XP(F)::B(J)
    - R(f);::QAR1(C)
  - Refutation
    - P(e);
Actual
- B(J);
- Vars
  - R(f);XP(D)::QAR1(C)
  - P(d);OGATE,XP(F)::B(J)
  - P(e);N_GUARD::B(J),XP(c)
  - R(f);::QAR1(C)

Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).