MESON Chess Problem Database
Problem Display
PID: 173606 (5B2/4n3/4Q3/p2rb3/P2k1p1R/NR1N4/3K1P2/8 w - - 0 1)
Boros, Sandor
2nd Prize, Arbeiter Schach Internationale, 1925
#2
9 + 6
| 6490 | yacpdb | 2018 |
| 5454 | Near Snap | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Ke4
- 2.Rxf4#
- 1...Rb5
- 2.Qc4#
- 1...Rd6
- 2.Qc4#
- 2.Qxe5#
- 1...Rd7
- 2.Qc4#
- 2.Qxe5#
- 1...Rd8
- 2.Qc4#
- 2.Qxe5#
- 1...Bd6
- 2.Qe3#
- 1...Bf6
- 2.Rxf4#
- 2.Qe3#
- 1...Bc7
- 2.Qe3#
- 1...Bg7
- 2.Rxf4#
- 2.Qe3#
- 1...Bb8
- 2.Qe3#
- 1...Bh8
- 2.Rxf4#
- 2.Qe3#
- 1...Ke4
- Tries
- 1.Sc2+?
- 1...Ke4
- 2.Rxf4#
- 1...Kc4!
- 1...Ke4
- 1.Bxe7?
- 1...Ke4
- 2.Rxf4#
- 1...Rb5
- 2.Qc4#
- 1...Rd6
- 2.Qc4#
- 2.Qxe5#
- 1...Rd7
- 2.Qc4#
- 2.Qxe5#
- 1...Rd8
- 2.Qc4#
- 2.Qxe5#
- 1...Bd6
- 2.Qe3#
- 1...Bf6
- 2.Rxf4#
- 2.Qe3#
- 1...Bc7
- 2.Qe3#
- 1...Bg7
- 2.Rxf4#
- 2.Qe3#
- 1...Bb8
- 2.Qe3#
- 1...Bh8
- 2.Rxf4#
- 2.Qe3#
- 1...Rc5!
- 1...Ke4
- 1.Bg7?
- threat
- 2.Rxf4#
- 1...Ke4
- 2.Rxf4#
- 1...Sg6!
- threat
- 1.Rc3?
- threat
- 2.Rc4#
- 1...Ke4
- 2.Rxf4#
- 1...Rc5!
- threat
- 1.Rb5?
- 1...Ke4
- 2.Rxf4#
- 1...Rxb5
- 2.Qc4#
- 1...Sf5
- 2.Qxd5#
- 1...Rd6
- 2.Qc4#
- 2.Qxe5#
- 1...Rd7
- 2.Qc4#
- 2.Qxe5#
- 1...Rd8
- 2.Qc4#
- 2.Qxe5#
- 1...Bd6
- 2.Qe3#
- 1...Bf6
- 2.Rxf4#
- 2.Qe3#
- 1...Bc7
- 2.Qe3#
- 1...Bg7
- 2.Rxf4#
- 2.Qe3#
- 1...Bb8
- 2.Qe3#
- 1...Bh8
- 2.Rxf4#
- 2.Qe3#
- 1...Sc6
- 2.Qxd5#
- 1...Sg6
- 2.Qxd5#
- 1...Sc8
- 2.Qxd5#
- 1...Sg8
- 2.Qxd5#
- 1...Rc5!
- 1...Ke4
- 1.Sc2+?
- Keys
- 1.Sxf4!
- 1...Ke4+
- 2.Sxd5#
- 1...Kc5+
- 2.Qxd5#
- 1...Bxf4+
- 2.Qe3#
- 1...Sf5
- 2.Se2#
- 2.Qxd5#
- 1...Rb5
- 2.Qc4#
- 1...Rc5
- 2.Se2#
- 1...Rd6
- 2.Qc4#
- 1...Rd7
- 2.Qc4#
- 1...Rd8
- 2.Qc4#
- 1...Bd6
- 2.Qe3#
- 1...Bf6
- 2.Qe3#
- 1...Bc7
- 2.Qe3#
- 1...Bg7
- 2.Sd3#
- 2.Qe3#
- 1...Bb8
- 2.Qe3#
- 1...Bh8
- 2.Sd3#
- 2.Qe3#
- 1...Sc6
- 2.Se2#
- 2.Qxd5#
- 1...Sg6
- 2.Se2#
- 2.Qxd5#
- 1...Sc8
- 2.Se2#
- 2.Qxd5#
- 1...Sg8
- 2.Se2#
- 2.Qxd5#
- 1...Ke4+
- 1.Sxf4!
Anticipated by 202591(1923)
There are these versions: 173616
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 1
- ADDED MATES = 7
- REMOVED MATES = 0
- Sets
- K(a);P-FLIGHT,P_PINS(E),P_SPINB(e)::R1(G),XP(b)
- R(d);OGATE::QAR1(H)
- B(e);OGATE::QAB1(H)
- Tries
- Try
- S(C);CHECK
- Vars
- K(a);P-FLIGHT,P_PINS(E),P_SPINB(e)::R1(G),XP(b)
- Refutation
- K(a);P-FLIGHT,P_PINS(E),P_SPINR(d)
- Try
- B(I);XS(f)
- Vars
- K(a);P-FLIGHT,P_PINS(E),P_SPINB(e)::R1(G),XP(b)
- R(d);OGATE::QAR1(H)
- B(e);OGATE::QAB1(H)
- Refutation
- R(d);
- Try
- B(I);P_PINB(e)
- Threat
- R(G),XP(b)
- Vars
- K(a);P-FLIGHT,P_PINS(E)::R1(G),XP(b)
- Refutation
- S(f);
- Try
- R(D);
- Threat
- R1(D)
- Vars
- K(a);P-FLIGHT,P_PINS(E),P_SPINB(e)::R1(G),XP(b)
- Refutation
- R(d);
- Try
- R(D);
- Vars
- K(a);P-FLIGHT,P_PINS(E),P_SPINB(e)::R1(G),XP(b)
- R(d);OGATE,XR(D)::QAR1(H)
- S(f);N_GUARD::QAR1(H),XR(d)
- B(e);OGATE::QAB1(H)
- Refutation
- R(d);
- Try
- Actual
- S(E);XP(b)
- Vars
- K(a);CHECK,P-FLIGHT,P_SPINB(e)::R(G)+S(E),XR(d)
- K(a);CHECK,P_SPINS(f),S_FLIGHT::QAR1(H),XR(d)
- B(e);CHECK,OGATE,P_SPINB(e),XS(E)::QAB1(H)
- R(d);OGATE::QAR1(H)
- R(d);SBLOCK::R(G)+S(E),DCHECK
- B(e);OGATE::QAB1(H)
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).