MESON Chess Problem Database

Problem Display
PID: 222372 (5RB1/b1P5/8/1p2p3/4k1P1/1K4R1/2Pr1Pb1/Q7 w - - 0 1)

Somma, Francesco

Funkschach, 1926

5RB1/b1P5/8/1p2p3/4k1P1/1K4R1/2Pr1Pb1/Q7

#2

9 + 6

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rd3+
      • 2.cxd3#
    • 1...Rd4
      • 2.Re3#
      • 2.Qe1#
    • 1...Rd5
      • 2.Bh7#
    • 1...Be3
      • 2.Rxe3#
    • 1...Bd4
      • 2.Qa8#
    • 1...Bb8
      • 2.Re3#
  • Tries
    • 1.Rd3?
      • threat
        • 2.Bd5#
        • 2.Bh7#
      • 1...Rxc2
        • 2.Bh7#
      • 1...Rxf2
        • 2.Bd5#
      • 1...Bd4
        • 2.Qa8#
      • 1...Rxd3+!
    • 1.Rf5?
      • threat
        • 2.Qxe5#
      • 1...Rd3+
        • 2.cxd3#
      • 1...Rd4
        • 2.Re3#
        • 2.Qe1#
      • 1...Bd4
        • 2.Qa8#
      • 1...Rd5!
    • 1.Qe1+?
      • 1...Kd4
        • 2.Qe3#
      • 1...Be3
        • 2.Qxe3#
      • 1...Re2!
    • 1.Qxa7?
      • threat
        • 2.Re3#
        • 2.Qe3#
      • 1...Rd3+
        • 2.cxd3#
      • 1...Rd4
        • 2.Re3#
      • 1...Bf3
        • 2.Qe3#
      • 1...Re2!
    • 1.c8Q?
      • threat
        • 2.Qf5#
      • 1...Rd3+
        • 2.cxd3#
      • 1...Rxf2
        • 2.Qb7#
        • 2.Qc6#
        • 2.Qa8#
      • 1...Rd7!
  • Keys
    • 1.f4!
      • threat
        • 2.Qxe5#
      • 1...Rd3+
        • 2.cxd3#
      • 1...exf4
        • 2.Re8#
      • 1...Rd4
        • 2.Qe1#
      • 1...Rd5
        • 2.Bh7#
      • 1...Bd4
        • 2.Qa8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • R(a);CHECK,OGATE::P(B),XR(a)
    • R(a);SBLOCK::B(I)
    • B(f);N_GUARD::R1(E),XB(f)
    • B(f);OGATE,SBLOCK::QAB(A)
    • B(f);N_GUARD::R1(E)
  • Tries
    • Try
      • R(E);
      • Threat
        • DUALS(2)
      • Vars
        • R(a);XP(B)::B(I)
        • R(a);XP(C)::B(I)
        • B(f);OGATE::QAB(A)
      • Refutation
        • R(a);CHECK,XR(E)
    • Try
      • R(H);
      • Threat
        • QAR1(A),XP(e)
      • Vars
        • R(a);CHECK,OGATE::P(B),XR(a)
        • B(f);OGATE,SBLOCK::QAB(A)
      • Refutation
        • R(a);
    • Try
      • Q(A);CHECK
      • Vars
        • K(c);P-FLIGHT::QAB1(A)
        • B(f);N_GUARD,P_SPINB(f)::QAR1(A),XB(f)
      • Refutation
        • R(a);P_SPINR(a)
    • Try
      • Q(A);XB(f)
      • Threat
        • DUALS(2)
      • Vars
        • R(a);CHECK,OGATE::P(B),XR(a)
        • R(a);::R1(E)
        • B(b);::QAR1(A)
      • Refutation
        • R(a);
    • Try
      • P(G);
      • Threat
        • QAB1(G)
      • Vars
        • R(a);CHECK,OGATE::P(B),XR(a)
      • Refutation
        • R(a);
  • Actual
    • P(C);
    • Threat
      • QAR1(A),XP(e)
    • Vars
      • R(a);CHECK,OGATE::P(B),XR(a)
      • P(e);OGATEB,SBLOCK,XP(C)::R(H)
      • R(a);N_GUARD,SBLOCK,S_CUTB(f)::QAR(A)
      • R(a);SBLOCK::B(I)
      • B(f);OGATE,SBLOCK::QAB(A)
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