MESON Chess Problem Database
Problem Display
PID: 18160 (1N6/1pBR4/1Pp1k1p1/5bPp/2r1BR1K/nQ1p4/P2P4/8 w - - 0 1)
Penrose, Lionel Sharples
Time & Tide, 1953
#2
11 + 9
SOLUTION
- SOUND
- Sets
- 1...Bh3
- 2.Rf6#
- 1...Bxe4
- 2.Rf6#
- 1...Bg4
- 2.Rf6#
- 1...Sb1
- 2.Qxc4#
- 1...Sc2
- 2.Qxc4#
- 1...Sb5
- 2.Qxc4#
- 1...c5
- 2.Bd5#
- 1...Bh3
- Tries
- 1.Kg3?
- 1...Bxe4
- 2.Rf6#
- 1...Bh3
- 2.Rf6#
- 1...Bg4
- 2.Rf6#
- 1...Sb1
- 2.Qxc4#
- 1...Sc2
- 2.Qxc4#
- 1...Sb5
- 2.Qxc4#
- 1...c5
- 2.Bd5#
- 1...h4+!
- 1...Bxe4
- 1.Bh1?
- 1...Be4
- 2.Rf6#
- 1...Bg4
- 2.Rf6#
- 1...Sb1
- 2.Qxc4#
- 1...Sc2
- 2.Qxc4#
- 1...Sb5
- 2.Qxc4#
- 1...c5
- 2.Bd5#
- 1...Bh3!
- 1...Be4
- 1.Bf3?
- 1...Be4
- 2.Rf6#
- 1...Bg4
- 2.Rf6#
- 1...Sb1
- 2.Qxc4#
- 1...Sc2
- 2.Qxc4#
- 1...Sb5
- 2.Qxc4#
- 1...c5
- 2.Bd5#
- 1...Bh3!
- 1...Be4
- 1.Bxc6?
- threat
- 2.Bd5#
- 1...Be4
- 2.Rf6#
- 1...bxc6!
- threat
- 1.Rf1?
- 1...Bxe4
- 2.Rf6#
- 1...Bh3
- 2.Rf6#
- 1...Bg4
- 2.Rf6#
- 1...Sb1
- 2.Qxc4#
- 1...Sc2
- 2.Qxc4#
- 1...Sb5
- 2.Qxc4#
- 1...c5!
- 1...Bxe4
- 1.Rf2?
- 1...Bxe4
- 2.Rf6#
- 1...Bh3
- 2.Rf6#
- 1...Bg4
- 2.Rf6#
- 1...Sb1
- 2.Qxc4#
- 1...Sc2
- 2.Qxc4#
- 1...Sb5
- 2.Qxc4#
- 1...c5!
- 1...Bxe4
- 1.Rf3?
- 1...Bxe4
- 2.Rf6#
- 1...Bh3
- 2.Rf6#
- 1...Bg4
- 2.Rf6#
- 1...Sb1
- 2.Qxc4#
- 1...Sc2
- 2.Qxc4#
- 1...Sb5
- 2.Qxc4#
- 1...c5!
- 1...Bxe4
- 1.Qxd3?
- threat
- 2.Qd6#
- 1...Sb5
- 2.Qxc4#
- 1...Rd4!
- threat
- 1.Kg3?
- Keys
- 1.Bg2!
- 1...Bh3
- 2.Bxh3#
- 1...Be4
- 2.Rf6#
- 1...Bg4
- 2.Rf6#
- 1...Sb1
- 2.Qxc4#
- 1...Sc2
- 2.Qxc4#
- 1...Sb5
- 2.Qxc4#
- 1...c5
- 2.Bd5#
- 1...Bh3
- 1.Bg2!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 1
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- B(d);OGATE::R1(E)
- B(d);OGATE,XB(D)::R1(E)
- S(a);N_GUARD::QAB(C),XR(c)
- P(f);N_GUARD::B(D)
- Tries
- Try
- K(F);S_FLIGHT
- Vars
- B(d);OGATE,XB(D)::R1(E)
- B(d);OGATE::R1(E)
- S(a);N_GUARD::QAB(C),XR(c)
- P(f);N_GUARD::B(D)
- Refutation
- P(e);CHECK
- Try
- B(D);P_SPINR(E)
- Vars
- B(d);N_PINR(E)::R1(E)
- S(a);N_GUARD::QAB(C),XR(c)
- P(f);N_GUARD::B(D)
- Refutation
- B(d);
- Try
- B(D);P_SPINR(E)
- Vars
- B(d);N_PINR(E)::R1(E)
- S(a);N_GUARD::QAB(C),XR(c)
- P(f);N_GUARD::B(D)
- Refutation
- B(d);
- Try
- B(D);P_SPINR(E),XP(f)
- Threat
- B(D)
- Vars
- B(d);N_PINR(E)::R1(E)
- Refutation
- P(i);XB(D)
- Try
- R(E);P_SPINB(D)
- Vars
- B(d);OGATE,XB(D)::R1(E)
- B(d);OGATE::R1(E)
- B(d);N_PINB(D),OGATE::R1(E)
- S(a);N_GUARD::QAB(C),XR(c)
- Refutation
- P(f);
- Try
- R(E);P_SPINB(D)
- Vars
- B(d);OGATE,XB(D)::R1(E)
- B(d);OGATE::R1(E)
- B(d);N_PINB(D),OGATE::R1(E)
- S(a);N_GUARD::QAB(C),XR(c)
- Refutation
- P(f);
- Try
- R(E);P_SPINB(D)
- Vars
- B(d);OGATE,XB(D)::R1(E)
- B(d);OGATE::R1(E)
- B(d);N_PINB(D),OGATE::R1(E)
- S(a);N_GUARD::QAB(C),XR(c)
- Refutation
- P(f);
- Try
- Q(C);N_PINR(c),XP(b)
- Threat
- QAR1(C)
- Vars
- S(a);N_GUARD::QAB(C),XR(c)
- Refutation
- R(c);
- Try
- Actual
- B(D);P_SPINR(E)
- Vars
- B(d);OGATEB::B(D),XB(d)
- B(d);N_PINR(E)::R1(E)
- S(a);N_GUARD::QAB(C),XR(c)
- P(f);N_GUARD::B(D)
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).