MESON Chess Problem Database

Problem Display
PID: 274701 (6B1/8/2ppNp2/2pPkp1b/KB2qN2/p3R1P1/2PPQ3/2r5 w - - 0 1)

Vasilenko, Anatoly Grigorovich

The Problemist, 2023

6B1/8/2ppNp2/2pPkp1b/KB2qN2/p3R1P1/2PPQ3/2r5

#2

11 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe3
      • 2.Qxe3#
    • 1...cxb4
      • 2.d4#
    • 1...c4
      • 2.Bc3#
    • 1...cxd5
      • 2.Sd3#
  • Tries
    • 1.Ka5?
      • threat
        • 2.Bc3#
      • 1...Qxe3
        • 2.Qxe3#
      • 1...cxb4
        • 2.d4#
      • 1...cxd5
        • 2.Sd3#
      • 1...Rxc2!
    • 1.Sd8?
      • threat
        • 2.Sxc6#
      • 1...Kd4
        • 2.Sxc6#
        • 2.Bc3#
      • 1...Qxe3
        • 2.Qxe3#
      • 1...cxd5
        • 2.Sc6#
      • 1...Be8!
    • 1.Qd3?
      • threat
        • 2.Qc3#
      • 1...Qxe3
        • 2.Qxe3#
      • 1...cxb4
        • 2.Qd4#
      • 1...cxd5
        • 2.Qxd5#
      • 1...Rxc2!
    • 1.Qc4?
      • threat
        • 2.Sd3#
        • 2.Bc3#
        • 2.Qc3#
      • 1...Rxc2
        • 2.Sd3#
      • 1...cxb4
        • 2.Sd3#
        • 2.Qd4#
        • 2.d4#
      • 1...cxd5
        • 2.Sd3#
        • 2.Qxd5#
      • 1...Be2
        • 2.Sg6#
        • 2.Bc3#
        • 2.Qc3#
      • 1...Qxe3!
    • 1.c4?
      • threat
        • 2.Sd3#
      • 1...Qxe3
        • 2.Qxe3#
      • 1...Bxe2
        • 2.Sg6#
      • 1...Rc3
        • 2.Bxc3#
      • 1...Rxc4!
  • Keys
    • 1.Sd4!
      • threat
        • 2.Sxc6#
      • 1...Kxd4
        • 2.Bc3#
      • 1...Qxe3
        • 2.Qxe3#
      • 1...cxd4
        • 2.Sd3#
      • 1...cxd5
        • 2.Sc6#
      • 1...Be8
        • 2.Sf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • Q(c);N_PINB(G),OGATE,XR(D)::QAR2(C),XQ(c)
    • P(d);N_GUARD,XB(G)::P(B)
    • P(d);N_PINB(G)::B(G)
    • P(h);SBLOCK,XP(I)::S(H)
  • Tries
    • Try
      • K(F);N_SPINB(G),P-FLIGHT
      • Threat
        • B(G)
      • Vars
        • Q(c);OGATE,XR(D)::QAR2(C),XQ(c)
        • P(d);N_GUARD,XB(G)::P(B)
        • P(h);SBLOCK,XP(I)::S(H)
      • Refutation
        • R(a);XP(A)
    • Try
      • S(J);
      • Threat
        • S(J),XP(h)
      • Vars
        • Q(c);N_PINB(G),OGATE,XR(D)::QAR2(C),XQ(c)
        • P(h);XP(I)::S(J)
      • Refutation
        • B(g);
    • Try
      • Q(C);
      • Threat
        • QAB(C)
      • Vars
        • Q(c);N_PINB(G),N_SPINQ(c),OGATE,XR(D)::QAR2(C),XQ(c)
        • P(d);N_GUARD,XB(G)::QAB1(C)
        • P(h);OGATE,XP(I)::QAR1(C),XP(h)
      • Refutation
        • R(a);XP(A)
    • Try
      • Q(C);N_SPINB(G)
      • Threat
        • DUALS(3)
      • Vars
        • R(a);XP(A)::S(H)
      • Refutation
        • Q(c);N_SPINQ(c),XR(D)
    • Try
      • P(A);N_SPINB(G)
      • Threat
        • S(H)
      • Vars
        • Q(c);OGATE,XR(D)::QAR2(C),XQ(c)
        • B(g);N_GUARD,XQ(C)::S(H)
        • R(a);N_GUARD::B(G),XR(a)
      • Refutation
        • R(a);P_PINB(G),XP(A)
  • Actual
    • S(J);N_SPINB(G)
    • Threat
      • S(J),XP(h)
    • Vars
      • K(e);N_SPINQ(c),OGATEB,S_FLIGHT,XS(J)::B(G)
      • Q(c);OGATE,XR(D)::QAR2(C),XQ(c)
      • P(d);SBLOCK,XS(J)::S(H)
      • P(h);XP(I)::S(J)
      • B(g);N_GUARD::S(J)
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