MESON Chess Problem Database
Problem Display
PID: 173616 (5B2/4n3/4Q3/p2rb3/P2k1p1R/NR1N4/3K4/8 w - - 0 1)
Boros, Sandor
Arbeiter Schachzeitung, 1925
#2
8 + 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.Sf2?
- 1...Rb5
- 2.Qc4#
- 1...Rc5
- 2.Rd3#
- 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.Qe3#
- 1...Bb8
- 2.Qe3#
- 1...Bh8
- 2.Qe3#
- 1...Sf5
- 2.Rd3#
- 1...Sc6
- 2.Rd3#
- 1...Sg6
- 2.Rd3#
- 1...Sc8
- 2.Rd3#
- 1...Sg8
- 2.Rd3#
- 1...Kc5+!
- 1...Rb5
- 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...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...Sf5
- 2.Qxd5#
- 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...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...Sf5
- 2.Se2#
- 2.Qxd5#
- 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)
This is a version of 173606
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 1
- ADDED MATES = 7
- REMOVED MATES = 0
- Sets
- K(a);P-FLIGHT,P_PINS(D),P_SPINB(e)::R1(F),XP(b)
- R(d);OGATE::QAR1(G)
- B(e);OGATE::QAB1(G)
- Tries
- Try
- S(B);CHECK
- Vars
- K(a);P-FLIGHT,P_PINS(D),P_SPINB(e)::R1(F),XP(b)
- Refutation
- K(a);P-FLIGHT,P_PINS(D),P_SPINR(d)
- Try
- S(D);
- Vars
- R(d);OGATE::QAR1(G)
- R(d);SBLOCK::R1(C)
- B(e);OGATE::QAB1(G)
- S(f);::R1(C)
- Refutation
- K(a);CHECK,N_SPINP(b),P_SPINS(f),S_FLIGHT
- Try
- B(H);XS(f)
- Vars
- K(a);P-FLIGHT,P_PINS(D),P_SPINB(e)::R1(F),XP(b)
- R(d);OGATE::QAR1(G)
- B(e);OGATE::QAB1(G)
- Refutation
- R(d);
- Try
- B(H);P_PINB(e)
- Threat
- R(F),XP(b)
- Vars
- K(a);P-FLIGHT,P_PINS(D)::R1(F),XP(b)
- Refutation
- S(f);
- Try
- R(C);
- Threat
- R1(C)
- Vars
- K(a);P-FLIGHT,P_PINS(D),P_SPINB(e)::R1(F),XP(b)
- Refutation
- R(d);
- Try
- R(C);
- Vars
- K(a);P-FLIGHT,P_PINS(D),P_SPINB(e)::R1(F),XP(b)
- R(d);OGATE,XR(C)::QAR1(G)
- B(e);OGATE::QAB1(G)
- S(f);N_GUARD::QAR1(G),XR(d)
- Refutation
- R(d);
- Try
- Actual
- S(D);XP(b)
- Vars
- K(a);CHECK,P-FLIGHT,P_SPINB(e)::R(F)+S(D),XR(d)
- K(a);CHECK,P_SPINS(f),S_FLIGHT::QAR1(G),XR(d)
- B(e);CHECK,OGATE,P_SPINB(e),XS(D)::QAB1(G)
- R(d);OGATE::QAR1(G)
- R(d);SBLOCK::R(F)+S(D),DCHECK
- B(e);OGATE::QAB1(G)
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).