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Problem Display

PID: 227755 (8/8/8/p7/K2p4/1Q1B4/1b6/k7 w - - 0 1)

Kovacs, Norbert

Magyar Sakkvilag, 1926

8/8/8/p7/K2p4/1Q1B4/1b6/k7

#2

3 + 4

6490	yacpdb	2020

SOLUTION

SOUND
Sets
- 1...Bc1
  - 2.Qb1#
- 1...Ba3
  - 2.Qb1#
  - 2.Qxa3#
- 1...Bc3
  - 2.Qb1#
  - 2.Qa3#
Tries
- 1.Kxa5?
  - 1...Bc1
    - 2.Qb1#
  - 1...Ba3
    - 2.Qb1#
    - 2.Qxa3#
  - 1...Bc3+!
- 1.Kb5?
  - 1...Bc1
    - 2.Qb1#
  - 1...Ba3
    - 2.Qb1#
    - 2.Qxa3#
  - 1...Bc3
    - 2.Qb1#
    - 2.Qa3#
  - 1...a4!
- 1.Bc2?
  - 1...Bc1
    - 2.Qb1#
  - 1...Ba3
    - 2.Qb1#
    - 2.Qxa3#
  - 1...Bc3
    - 2.Qb1#
    - 2.Qa3#
  - 1...d3!
- 1.Be4?
  - 1...Bc1
    - 2.Qb1#
  - 1...Ba3
    - 2.Qb1#
    - 2.Qxa3#
  - 1...Bc3
    - 2.Qb1#
    - 2.Qa3#
  - 1...d3!
- 1.Bf5?
  - 1...Bc1
    - 2.Qb1#
  - 1...Ba3
    - 2.Qb1#
    - 2.Qxa3#
  - 1...Bc3
    - 2.Qb1#
    - 2.Qa3#
  - 1...d3!
- 1.Bg6?
  - 1...Bc1
    - 2.Qb1#
  - 1...Ba3
    - 2.Qb1#
    - 2.Qxa3#
  - 1...Bc3
    - 2.Qb1#
    - 2.Qa3#
  - 1...d3!
- 1.Bh7?
  - 1...Bc1
    - 2.Qb1#
  - 1...Ba3
    - 2.Qb1#
    - 2.Qxa3#
  - 1...Bc3
    - 2.Qb1#
    - 2.Qa3#
  - 1...d3!
- 1.Qd1+?
  - 1...Ka2
    - 2.Bc4#
    - 2.Qb1#
  - 1...Bc1!
- 1.Qb5?
  - 1...Bc1
    - 2.Qb1#
  - 1...Ba3
    - 2.Qb1#
  - 1...Bc3
    - 2.Qb1#
  - 1...Ka2!
- 1.Qb6?
  - 1...Bc1
    - 2.Qb1#
  - 1...Ba3
    - 2.Qb1#
  - 1...Bc3
    - 2.Qb1#
  - 1...Ka2!
- 1.Qb7?
  - 1...Bc1
    - 2.Qb1#
  - 1...Ba3
    - 2.Qb1#
  - 1...Bc3
    - 2.Qb1#
  - 1...Ka2!
- 1.Qb8?
  - 1...Bc1
    - 2.Qb1#
  - 1...Ba3
    - 2.Qb1#
  - 1...Bc3
    - 2.Qb1#
  - 1...Ka2!
Keys
- 1.Qc2!
  - threat
    - 2.Qb1#
  - 1...Ka2
    - 2.Qb1#

FEATURES

Static
- TYPE = BLOCK_THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 1
Sets
- B(b);OGATE::QAR1(A)
Tries
- Try
  - K(C);P-FLIGHT,XP(d)
  - Vars
    - B(b);OGATE::QAR1(A)
  - Refutation
    - B(b);CHECK
- Try
  - K(C);S_FLIGHT
  - Vars
    - B(b);OGATE::QAR1(A)
  - Refutation
    - P(d);
- Try
  - B(B);
  - Vars
    - B(b);OGATE::QAR1(A)
  - Refutation
    - P(c);
- Try
  - B(B);
  - Vars
    - B(b);OGATE::QAR1(A)
  - Refutation
    - P(c);
- Try
  - B(B);
  - Vars
    - B(b);OGATE::QAR1(A)
  - Refutation
    - P(c);
- Try
  - B(B);
  - Vars
    - B(b);OGATE::QAR1(A)
  - Refutation
    - P(c);
- Try
  - B(B);
  - Vars
    - B(b);OGATE::QAR1(A)
  - Refutation
    - P(c);
- Try
  - Q(A);CHECK
  - Refutation
    - B(b);P_SPINB(b)
- Try
  - Q(A);
  - Vars
    - B(b);OGATE::QAR1(A)
  - Refutation
    - K(a);P-FLIGHT
- Try
  - Q(A);
  - Vars
    - B(b);OGATE::QAR1(A)
  - Refutation
    - K(a);P-FLIGHT
- Try
  - Q(A);
  - Vars
    - B(b);OGATE::QAR1(A)
  - Refutation
    - K(a);P-FLIGHT
- Try
  - Q(A);
  - Vars
    - B(b);OGATE::QAR1(A)
  - Refutation
    - K(a);P-FLIGHT
Actual
- Q(A);
- Threat
  - QAR1(A)
- Vars
  - K(a);P-FLIGHT,P_SPINB(b)::QAB1(A)

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).