MESON Chess Problem Database

Problem Display
PID: 206306 (8/8/8/4R2B/1K3N1B/1QN2r2/1RPk1n2/4bb2 w - - 0 1)

Mai, Guglielmo

L'Alfiere di Re, 1925

8/8/8/4R2B/1K3N1B/1QN2r2/1RPk1n2/4bb2

#2

9 + 5

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Re2+?
      • 1...Kc1
        • 2.Rb1#
      • 1...Bxe2!
  • Keys
    • 1.Sa2!
      • threat
        • 2.c3#
        • 2.c4#
      • 1...Kd1+
        • 2.c3#
      • 1...Rxb3+
        • 2.cxb3#
      • 1...Rxf4+
        • 2.c4#
      • 1...Sd3+
        • 2.cxd3#
      • 1...Rc3
        • 2.Qxc3#
      • 1...Bd3
        • 2.cxd3#
      • 1...Bc4
        • 2.c3#
      • 1...Sd1
        • 2.Bxe1#
      • 1...Se4
        • 2.c4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(H);CHECK
      • Vars
        • K(c);P_PINS(D),S_FLIGHT::R1(A)
      • Refutation
        • B(b);XR(H)
  • Actual
    • S(D);
    • Threat
      • DUALS(2)
    • Vars
      • K(c);CHECK,P-FLIGHT,P_SPINR(e)::QAB(C)+P(B)
      • R(e);CHECK,OGATE,XQ(C)::R(A)+P(B),XR(e)
      • R(e);CHECK,XS(F)::R(A)+P(B)
      • S(d);CHECK,OGATE::R(A)+P(B),XS(d)
      • R(e);N_GUARD::QAB1(C),XR(e)
      • B(b);OGATE::R(A)+P(B),XB(b)
      • B(b);::R(A)+P(B)
      • S(d);OGATE,SBLOCK::B(G),XB(a)
      • S(d);::R(A)+P(B)
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