MESON Chess Problem Database
Problem Display
PID: 164234 (8/b3N1PK/2pp1rQ1/R2nk1P1/2r1b3/4R2B/2qPN3/8 w - - 0 1)
Howard, Kenneth Samuel
The Observer, 1926
(First published on Sun Apr 4 1926)
#2
10 + 9
| 15239 | Valois Notebooks | 2017 |
SOLUTION
- SOUND
- Sets
- 1...Rc5
- 2.d4#
- 1...Rf5
- 2.Qxf5#
- 1...Re6
- 2.Qf5#
- 1...Rxg6
- 2.Sxg6#
- 1...Bc5
- 2.Sxc6#
- 1...c5
- 2.Sc6#
- 1...Rc5
- Tries
- 1.Kg8?
- threat
- 2.Qxf6#
- 1...Rxg6
- 2.Sxg6#
- 1...Rc5
- 2.d4#
- 1...Rf1
- 2.Qe6#
- 1...Rf2
- 2.Qe6#
- 1...Rf3
- 2.Qe6#
- 1...Rf4
- 2.Qe6#
- 1...Rf5
- 2.Qxf5#
- 1...Re6
- 2.Qf5#
- 2.Qxe6#
- 1...Rf7
- 2.Qe6#
- 1...Bc5
- 2.Sxc6#
- 1...c5
- 2.Sc6#
- 1...Rf8+!
- threat
- 1.Kh8?
- threat
- 2.Qxf6#
- 1...Rxg6
- 2.Sxg6#
- 1...Rc5
- 2.d4#
- 1...Rf1
- 2.Qe6#
- 1...Rf2
- 2.Qe6#
- 1...Rf3
- 2.Qe6#
- 1...Rf4
- 2.Qe6#
- 1...Rf5
- 2.Qxf5#
- 1...Re6
- 2.Qf5#
- 2.Qxe6#
- 1...Rf7
- 2.Qe6#
- 1...Bc5
- 2.Sxc6#
- 1...c5
- 2.Sc6#
- 1...Rf8+!
- threat
- 1.Bf5?
- threat
- 2.Qxf6#
- 1...Rxf5
- 2.Qxf5#
- 1...Rc5
- 2.d4#
- 1...Re6
- 2.Qxe6#
- 1...Rf7
- 2.Qe6#
- 1...Rf8
- 2.Qe6#
- 1...Bc5
- 2.Sxc6#
- 1...c5
- 2.Sc6#
- 1...Rxg6!
- threat
- 1.Rxe4+?
- 1...Rxe4
- 2.Qxf6#
- 1...Qxe4!
- 1...Rxe4
- 1.Kg8?
- Keys
- 1.Kh6!
- threat
- 2.Qxf6#
- 1...Rxg6+
- 2.Sxg6#
- 1...Rc5
- 2.d4#
- 1...Rf1
- 2.Qe6#
- 1...Rf2
- 2.Qe6#
- 1...Rf3
- 2.Qe6#
- 1...Rf4
- 2.Qe6#
- 1...Rf5
- 2.Qxf5#
- 1...Re6
- 2.Qxe6#
- 1...Rf7
- 2.Qe6#
- 1...Rf8
- 2.Qe6#
- 1...Bc5
- 2.Sxc6#
- 1...c5
- 2.Sc6#
- threat
- 1.Kh6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 6
- REMOVED MATES = 0
- Sets
- R(b);N_GUARD,N_SPINS(d),S_CUTB(i)::P(A)
- R(h);N_GUARD,N_PINQ(G)::QAR1(G),XR(h)
- R(h);N_GUARD::QAR1(G)
- R(h);XQ(G)::S(H),XR(h)
- B(i);N_SPINS(d),S_CUTR(b)::S(H),XP(f)
- P(f);N_SPINS(d),S_CUTR(b)::S(H)
- Tries
- Try
- K(J);N_SPINQ(G),S_FLIGHT
- Threat
- QAB1(G),XR(h)
- Vars
- R(h);P_PINP(I),XQ(G)::S(H),XR(h)
- R(b);N_GUARD,N_SPINS(d),S_CUTB(i)::P(A)
- R(h);OGATE::QAR1(G)
- R(h);N_GUARD::QAR1(G),XR(h)
- B(i);N_SPINS(d),S_CUTR(b)::S(H),XP(f)
- P(f);N_SPINS(d),S_CUTR(b)::S(H)
- Refutation
- R(h);CHECK
- Try
- K(J);N_SPINQ(G),P-FLIGHT
- Threat
- QAB1(G),XR(h)
- Vars
- R(h);XQ(G)::S(H),XR(h)
- R(b);N_GUARD,N_SPINS(d),S_CUTB(i)::P(A)
- R(h);OGATE::QAR1(G)
- R(h);N_GUARD::QAR1(G),XR(h)
- B(i);N_SPINS(d),S_CUTR(b)::S(H),XP(f)
- P(f);N_SPINS(d),S_CUTR(b)::S(H)
- Refutation
- R(h);CHECK
- Try
- B(D);N_SPINQ(G)
- Threat
- QAB1(G),XR(h)
- Vars
- R(h);OGATE,XB(D)::QAR1(G),XR(h)
- R(b);N_GUARD,N_SPINS(d),S_CUTB(i)::P(A)
- R(h);OGATE::QAR1(G),XR(h)
- R(h);OGATE,P_PINP(I)::QAR1(G)
- R(h);OGATE::QAR1(G)
- B(i);N_SPINS(d),S_CUTR(b)::S(H),XP(f)
- P(f);N_SPINS(d),S_CUTR(b)::S(H)
- Refutation
- R(h);XQ(G)
- Try
- R(C);CHECK,N_SPINQ(G),XB(c)
- Vars
- R(b);SBLOCK,XR(C)::QAB1(G),XR(h)
- Refutation
- Q(a);P_PINQ(G),XR(C)
- Try
- Actual
- K(J);P-FLIGHT
- Threat
- QAB1(G),XR(h)
- Vars
- R(h);CHECK,XQ(G)::S(H),XR(h)
- R(b);N_GUARD,N_SPINS(d),S_CUTB(i)::P(A)
- R(h);N_PINQ(G)::QAR1(G)
- R(h);N_PINQ(G)::QAR1(G),XR(h)
- R(h);::QAR1(G),XR(h)
- B(i);N_SPINS(d),S_CUTR(b)::S(H),XP(f)
- P(f);N_SPINS(d),S_CUTR(b)::S(H)
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